134-459: Brookeville is a town in Montgomery County, Maryland , located 20 km (12 mi) north of Washington, D.C. , and 2 km (1.2 mi) north of Olney . Brookeville was settled by Quakers late in the 18th century and was incorporated as a town in 1808. Historically a farming town , Brookeville is now at the northern edge of the densely developed Washington suburbs . The population
268-475: A Friends school and became a public school in 1909, serving Brookeville and other nearby areas. Quakers Richard Thomas and his wife Deborah Brooke founded the town of Brookeville in 1794, and named it after her family. The town was established on land inherited by Deborah Brooke from her father Roger Brooke IV, son of an influential Quaker landholder, James Brooke. At the time, Brooke was the largest landholder in what would become Montgomery County. Thomas set up
402-407: A Friends school and became a public school in 1909. Most of Brookeville, including the town proper, is located in the service area for Rosa Parks Middle School and Greenwood Elementary School. Some areas, bordering Howard County, are located the service area for William H. Farquhar Middle School and Sherwood Elementary School. Up until 1992, when Rosa Parks Middle School opened, all of Brookeville
536-529: A strongbox , which contained the entire U.S. treasury. On the night of August 26, he stayed in the home of Caleb Bentley , whose wife Henrietta Thomas was close friends with Dolley Madison . Madison stayed up all night, dispatching orders, while soldiers remained on guard outside. After the British left Washington, they sailed to nearby Baltimore, where they attacked Fort McHenry and were repulsed. Upon hearing that news, Madison returned to Washington. Madison wrote
670-402: A family was $ 111,737. Males had a median income of $ 71,841 versus $ 55,431 for females. The per capita income for the county was $ 47,310. About 4.0% of families and 6.0% of the population were below the poverty line , including 7.2% of those under age 18 and 6.3% of those age 65 or over. As of the 2000 United States census , there were 873,058 people living in the county. The racial makeup of
804-427: A female householder with no husband present, and 31.8% were non-families. 18.2% of all households were made up of individuals, and 9.1% had someone living alone who was 65 years of age or older. The population density was 933.6 inhabitants per square mile (360.5/km). The racial makeup of the town was 97.50% White , 0.83% from other races , and 1.67% from two or more races. Hispanic or Latino of any race were 2.50% of
938-449: A frozen food storage compartment may have a small section just to make ice cubes. Freezers may have drawers to store food in, or they may have no divisions (chest freezers). Refrigerators and freezers may be free-standing, or built into a kitchen's cabinet. Three distinct classes of refrigerator are common: Other specialized cooling mechanisms may be used for cooling, but have not been applied to domestic or commercial refrigerators. In
1072-451: A house without air-conditioning (space heating and/or cooling) refrigerators consume more energy than any other home device. In the early 1990s a competition was held among the major US manufacturers to encourage energy efficiency. Current US models that are Energy Star qualified use 50% less energy than the average 1974 model used. The most energy-efficient unit made in the US consumes about half
1206-449: A kilowatt-hour per day (equivalent to 20 W continuously). But even ordinary units are reasonably efficient; some smaller units use less than 0.2 kWh per day (equivalent to 8 W continuously). Larger units, especially those with large freezers and icemakers, may use as much as 4 kW·h per day (equivalent to 170 W continuously). The European Union uses a letter-based mandatory energy efficiency rating label , with A being
1340-498: A large number built in the 1970s. As reported in the 2000 census, 30% of homes within the Brookeville ZIP Code were built during the 1990s, 15.6% during the 1980s, 35.6% in the 1970s, 13% between 1940 and 1970, and 5.7% before 1940. 54% of the population had moved into their homes during the 1990s, 22.9% in the 1980s, 17.5% in the 1970s, and 5.6% have lived in the same home since before 1970. The median purchase price for homes in
1474-661: A larger area as Brookeville than what falls within the town boundaries. This includes areas extending to the Patuxent River and the Howard County border, and including the small hamlets of Sunshine and Brighton. Reddy Branch Stream Valley Park surrounds the Town of Brookeville, with the creek flowing west to east towards the Patuxent. Other parks and recreational areas include Rachel Carson Conservation Park , Patuxent River State Park , and
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#17328556614331608-399: A liquid nitrogen backup. Alternatives to the vapor-compression cycle not in current mass production include: Many modern refrigerator/freezers have the freezer on top and the refrigerator on the bottom. Most refrigerator-freezers—except for manual defrost models or cheaper units—use what appears to be two thermostats. Only the refrigerator compartment is properly temperature controlled. When
1742-473: A mill, along the Reddy Branch, which forms the northern border of the town. Caleb Bentley opened a store and a post office in 1802, becoming the first postmaster of Brookeville. The town's charter was approved in 1808, though not formally issued until 1890. Brookeville served as a market town for the agriculture industry in the surrounding area. During the 19th century, Brookeville was home to several mills,
1876-441: A new county from Frederick County, Maryland to aid area residents in simplifying their business affairs. The measure passed, creating the new political entity of Montgomery County in what was then the colonial -era Province of Maryland . According to the U.S. Census Bureau , the county has a total area of 507 square miles (1,310 km ), of which 491 square miles (1,270 km ) is land and 16 square miles (41 km ) (3.1%)
2010-401: A note to his wife that morning. Finding that our army has left Montgomery Court House, we pushed on to this place, with a view to join it, or proceed to the city, as further information might prescribe. I have just received a line from Col. Monroe saying that the enemy were out of Washington on the retreat to their ships and advising our immediate return to Washington. I know not where we are in
2144-432: A person and may be about one metre (3 ft 3 in) wide with a capacity of 0.6 m (21 cu ft). Refrigerators and freezers may be free standing, or built into a kitchen. The refrigerator allows the modern household to keep food fresh for longer than before. Freezers allow people to buy perishable food in bulk and eat it at leisure, and make bulk purchases . Ancient origins Ancient Iranians were among
2278-400: A phenomenon known as auto-refrigeration . This cold and partially vaporized refrigerant continues through the coils or tubes of the evaporator unit. A fan blows air from the compartment ("box air") across these coils or tubes and the refrigerant completely vaporizes, drawing further latent heat from the box air. This cooled air is returned to the refrigerator or freezer compartment, and so keeps
2412-525: A practical electric refrigeration unit, which later became the basis for the Kelvinator . A self-contained refrigerator, with a compressor on the bottom of the cabinet was invented by Alfred Mellowes in 1916. Mellowes produced this refrigerator commercially but was bought out by William C. Durant in 1918, who started the Frigidaire company to mass-produce refrigerators. In 1918, Kelvinator company introduced
2546-532: A preparatory school established in 1814, was one of the first schools in the county. Among those educated at the Academy, include Dr. Henry Howard, who established Howard County, and William Edward Magruder, great-grandson of Colonel Zadok Magruder . In 1869, the Brookeville Academy relocated to Merrywood, located on nearby farmland outside of town. The original building has since been used as a meeting facility by
2680-470: A prosperous farmer established a company in 1849 to build a toll road to connect Brookeville to the Seventh Street Pike. The turnpike was sold to the state of Maryland in 1914, and later became Georgia Avenue, now Maryland Route 97 . Brookeville was home to Thomas Moore Jr., who along with Caleb Bentley was instrumental in the creation of the U.S. Department of Agriculture . Moore is also credited as
2814-582: A public bi-county water and sewer utility in the Washington Suburban Sanitary Commission (WSSC). In October 2020, the Montgomery County Council unanimously passed an ordinance that implemented an LGBTIQ+ bill of rights. Montgomery County is an alcoholic beverage control county. Beer and wine may also be sold in private stores. Until 1964, only three restaurants in the county had liquor licenses to serve liquor by
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#17328556614332948-554: A range of sizes. Among the smallest is a 4-litre (0.14 cu ft) Peltier refrigerator advertised as being able to hold 6 cans of beer. A large domestic refrigerator stands as tall as a person and may be about 1 metre (3.3 ft) wide with a capacity of 600 litres (21 cu ft). Some models for small households fit under kitchen work surfaces, usually about 86 centimetres (34 in) high. Refrigerators may be combined with freezers, either stacked with refrigerator or freezer above, below, or side by side. A refrigerator without
3082-423: A similar gas, as a refrigerant, with its condenser kept at around −40 °C by a second stage which uses a more conventional refrigerant. For much lower temperatures, laboratories usually purchase liquid nitrogen (−196 °C [−320.8 °F]), kept in a Dewar flask , into which the samples are suspended. Cryogenic chest freezers can achieve temperatures of down to −150 °C (−238 °F), and may include
3216-447: A small refrigerating machine in 1755. Cullen used a pump to create a partial vacuum over a container of diethyl ether , which then boiled , absorbing heat from the surrounding air. The experiment even created a small amount of ice, but had no practical application at that time. In 1805, American inventor Oliver Evans described a closed vapor-compression refrigeration cycle for the production of ice by ether under vacuum. In 1820,
3350-424: A working prototype, but it was a commercial failure. American engineer Alexander Twining took out a British patent in 1850 for a vapor compression system that used ether. The first practical vapor compression refrigeration system was built by James Harrison , a Scottish Australian. His 1856 patent was for a vapor compression system using ether, alcohol or ammonia. He built a mechanical ice-making machine in 1851 on
3484-680: Is Rockville , and Germantown is the most populous place in the county. The county is adjoined to Washington, D.C. , the nation's capital, and is part of the Washington metropolitan area and the Washington–Baltimore combined statistical area . Most of the county's residents live in Silver Spring , Bethesda , Germantown , and the incorporated cities of Rockville and Gaithersburg . The average household income in Montgomery County
3618-463: Is "Gardez Bien", a French phrase meaning "Watch Well". The county's motto is also the motto of its namesake's family. Prior to 1688, the first tract of land in what is now Montgomery County was granted by Charles I in a charter to the first Lord Baltimore , the head of the Calvert family. The county's creation was a focus of Thomas S. Wootton who, on August 31, 1776, introduced a measure to form
3752-669: Is $ 40,540 compared to $ 21,587 for all of the United States. 76.2% of the population over age 16 is in the labor force . Average commuting time is 35.9 minutes, with 84.1% driving alone, 9% carpooling, 2.3% using public transportation, and 3.1% working at home. Most people are employed in management, professional, and related occupations, with 59.5% in those types of jobs. 19.3% are employed in sales and office occupations, 10.7% in service occupations, 5.7 in construction, extraction, and maintenance occupations, and 4.9% in production, transportation, and material moving occupations. 24.4% of those in
3886-506: Is a nationally accredited U.S. law enforcement agency and acts as the enforcement arm of the courts in the county. All of its deputy sheriffs are fully certified law enforcement officials with full authority of arrest. The office was created in July 1777 and is the oldest law enforcement agency in Montgomery County. It is headquartered in Rockville, Maryland . It was nationally accredited in 1995,
4020-530: Is a specialized refrigerator, or portion of a refrigerator, that maintains its contents’ temperature below the freezing point of water. The refrigerator replaced the icebox , which had been a common household appliance for almost a century and a half. The United States Food and Drug Administration recommends that the refrigerator be kept at or below 4 °C (40 °F) and that the freezer be regulated at −18 °C (0 °F). The first cooling systems for food involved ice. Artificial refrigeration began in
4154-579: Is akin to a stainless steel appearance. During the latter part of the 1960s and the early 1970s, earth tone colors were popular, including Harvest Gold , Avocado Green and almond. In the 1980s, black became fashionable. In the late 1990s stainless steel came into vogue. Since 1961 the Color Marketing Group has attempted to coordinate the colors of appliances and other consumer goods. Freezer units are used in households and in industry and commerce. Food stored at or below −18 °C (0 °F)
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4288-650: Is an important business and research center. It is the epicenter for biotechnology in the Mid-Atlantic region. Montgomery County, as third largest biotechnology cluster in the U.S., holds a large cluster and companies of large corporate size within the state. Biomedical research is carried out by institutions including Johns Hopkins University 's Montgomery County Campus (JHU MCC), and the Howard Hughes Medical Institute (HHMI). Federal government agencies in Montgomery County engaged in related work include
4422-497: Is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Brookeville has a humid subtropical climate , abbreviated "Cfa" on climate maps. As of the 2000 census , the town had a population of 120; there were 44 households, out of which 38.6% had children under the age of 18 living with them, 52.3% were married couples living together, 11.4% had
4556-445: Is cooled to a temperature below the room temperature. Refrigeration is an essential food storage technique around the world. The low temperature reduces the reproduction rate of bacteria , so the refrigerator lowers the rate of spoilage . A refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is 3 to 5 °C (37 to 41 °F). A freezer
4690-410: Is forced through a metering or throttling device, also known as an expansion valve (essentially a pin-hole sized constriction in the tubing) to an area of much lower pressure. The sudden decrease in pressure results in explosive-like flash evaporation of a portion (typically about half) of the liquid. The latent heat absorbed by this flash evaporation is drawn mostly from adjacent still-liquid refrigerant,
4824-442: Is highly flammable, harmful to the eyes, and toxic if inhaled or ingested. The introduction of Freon in the 1920s expanded the refrigerator market during the 1930s and provided a safer, low-toxicity alternative to previously used refrigerants. Separate freezers became common during the 1940s; the term for the unit, popular at the time, was deep freeze . These devices, or appliances , did not go into mass production for use in
4958-420: Is more than the road was designed to handle. Brookeville residents have advocated for a bypass road to be constructed, to take traffic around the town. The bypass road around the town was in the planning stages for some time, since being recommended by county planning officials in 1966. The bypass road will include two roundabouts, one on either side of the town. The project was under construction as of May 2019 and
5092-670: Is most common in summer thunderstorms, but drought periods are more likely during these months because summer precipitation is more variable than winter. The mean annual temperature is 55 °F (13 °C). The average summer (June–July–August) afternoon maximum is about 85 °F (29 °C) while the morning minimums average 66 °F (19 °C). In winter (December–January–February), these averages are 44 °F (7 °C) and 28 °F (−2 °C). Extreme heat waves can raise readings to around and slightly above 100 °F (38 °C), and arctic blasts can drop lows to −10 °F (−23 °C) to 0 °F (−18 °C). For Rockville ,
5226-404: Is not acceptable. They can be totally silent (if a fan for air circulation is not fitted) but are less energy-efficient than other methods. "Ultra-cold" or " ultra-low temperature (ULT) " (typically −80 or −86 °C [−112 or −123 °F]) freezers, as used for storing biological samples, also generally employ two stages of cooling, but in cascade . The lower temperature stage uses methane , or
5360-634: Is represented in the Maryland House of Delegates by District 14 representatives, Anne Kaiser (D), Pamela E. Queen (D), and Bernice Mireku-North (D). Craig Zucker (D) represents Brookeville in the Maryland State Senate . Brookeville is located in Maryland's 8th congressional district , which is represented in the United States Congress by Jamie Raskin (D). The Brookeville Academy,
5494-455: Is safe indefinitely. Most household freezers maintain temperatures from −23 to −18 °C (−9 to 0 °F), although some freezer-only units can achieve −34 °C (−29 °F) and lower. Refrigerator freezers generally do not achieve lower than −23 °C (−9 °F), since the same coolant loop serves both compartments: Lowering the freezer compartment temperature excessively causes difficulties in maintaining above-freezing temperature in
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5628-423: Is still blown from the freezer. Newer refrigerators may include: These older freezer compartments were the main cooling body of the refrigerator, and only maintained a temperature of around −6 °C (21 °F), which is suitable for keeping food for a week. Later advances included automatic ice units and self compartmentalized freezing units. Domestic refrigerators and freezers for food storage are made in
5762-488: Is the 20th-highest among U.S. counties as of 2020. The county has the highest percentage (29.2%) of residents over 25 years of age who hold post-graduate degrees . Like other counties in the Washington metropolitan area, the county has several U.S. government offices, scientific research and learning centers, and business campuses. The Maryland state legislature named Montgomery County after Richard Montgomery ;
5896-512: Is the highest qualification, for those refrigerators that are at least 30% more efficient than Federal standards. About 82% of the Energy Star qualified refrigerators are Tier 1, with 13% qualifying as Tier 2, and just 5% at Tier 3. Besides the standard style of compressor refrigeration used in ordinary household refrigerators and freezers, there are technologies such as absorption and magnetic refrigeration . Although these designs generally use
6030-518: Is water. Montgomery County lies entirely inside the Piedmont plateau . The topography is generally rolling. Elevations range from a low of near sea level along the Potomac River to about 875 feet in the northernmost portion of the county north of Damascus. Relief between valley bottoms and hilltops is several hundred feet. Earthquakes are rare; the most recent one, on June 24, 2024, had a 1.8 magnitude and
6164-457: The 2000 census . The median age is 37.5, and the racial composition is 84.1% Caucasian, 6.7% African-American, 6% Asian, and 3.6% Hispanic. The Brookeville area has a very high rate of home ownership , with 93.3% of its 2,063 households owning homes, which compares to a national average of 66.2% for home ownership. A large portion of the homes in Brookeville were built during the 1990s, as well as
6298-530: The American Legion and other organizations. On June 2, 1909, the Public School Board took over running the school. In 1988, the original building was sold to the Town of Brookeville, which maintains the building as a historic site and use for events. The Longwood School for Boys was a private school that was established in 1946 by George F. Kimmell, who had bought Longwood Manor. In 1952, Kimmell leased
6432-890: The Food and Drug Administration (FDA), the National Institutes of Health (NIH), the Uniformed Services University of the Health Sciences (USUHS), and the Walter Reed Army Institute of Research . Many large firms are based in the county, including Coventry Health Care , Lockheed Martin , Marriott International , Host Hotels & Resorts , Travel Channel , Ritz-Carlton , Robert Louis Johnson Companies ( RLJ Companies ), Choice Hotels , MedImmune , TV One , BAE Systems Inc. , Hughes Network Systems and GEICO . Other U.S. federal government agencies based in
6566-457: The Patuxent River and the Howard County border. The town is 2 miles (3 km) north of Olney and 20 miles (32 km) north of downtown Washington, D.C. The Town of Brookeville is formally incorporated, and covers an area of 0.1 square miles (0.26 km). Areas beyond the formal town boundaries, extending to the Howard County boundary, use Brookeville mailing addresses, falling within
6700-537: The Postum Company (the forerunner of General Foods ), which had acquired the technology when it bought the rights to Clarence Birdseye 's successful fresh freezing methods. The majority of refrigerators were white in the early 1950s, but between the mid-1950s and the present, manufacturers and designers have added color. Pastel colors, such as pink and turquoise, gained popularity in the late 1950s and early 1960s. Certain versions also had brushed chrome plating, which
6834-475: The Triadelphia Reservoir . Areas to the north of Brookeville in Howard County and Carroll County have also experienced rapid population growth. Georgia Avenue carries a substantial volume of traffic through the town, from these areas to the north into Montgomery County and Washington, D.C. In 1966, county planning officials recommended that a bypass be built to carry commuters around the town. The project
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#17328556614336968-509: The ozone layer , causing governments to issue a ban on its use in new refrigerators and air-conditioning systems in 1994. The less harmful replacement for R-12, R-134a (tetrafluoroethane), has been in common use since 1990, but R-12 is still found in many old systems. Refrigeration, continually operated, typically consumes up to 50% of the energy used by a supermarket. Doors, made of glass to allow inspection of contents, improve efficiency significantly over open display cases, which use 1.3 times
7102-629: The refrigeration cycle . In 1894, Hungarian inventor and industrialist István Röck started to manufacture a large industrial ammonia refrigerator which was powered by electric compressors (together with the Esslingen Machine Works). Its electric compressors were manufactured by the Ganz Works . At the 1896 Millennium Exhibition, Röck and the Esslingen Machine Works presented a 6-tonne capacity artificial ice producing plant. In 1906,
7236-404: The tenth-highest median household income in the United States, and the second highest in the state after Howard County as of 2011. The median household income in 2007 was $ 89,284 and the median family income was $ 106,093. Males had a median income of $ 66,415 versus $ 52,134 for females. The per capita income for the county was $ 43,073. About 3.3% of families and 4.6% of the population were below
7370-432: The 2009–2010 season. Since the 1970s, the county has had in place a Moderately Priced Dwelling Unit (MPDU) zoning plan that requires developers to include affordable housing in any new residential developments that they construct in the county. The goal is to create socioeconomically mixed neighborhoods and schools so the rich and poor are not isolated in separate parts of the county. Developers who provide for more than
7504-463: The 20833 ZIP Code. Located within the ZIP Code are the small hamlets of Sunshine and Brighton. Georgia Avenue ( Maryland Route 97 ), which is a major north–south route through this part of Maryland, passes through the town. Brookeville Road connects the town with Laytonsville and other areas to the west. Brighton Dam Road extends to the east, crossing New Hampshire Avenue ( Maryland Route 650 ), then
7638-696: The Beltway and I-270 , and they assist county and city police in investigation of some major crimes. Montgomery County has a budget of $ 2.3 billion. Approximately $ 1.48 billion are invested in Montgomery County Public Schools and $ 128 million in Montgomery College . Montgomery and Prince George's counties share a bi-county planning and parks agency in the Maryland-National Capital Park and Planning Commission (M-NCPPC) and
7772-460: The British scientist Michael Faraday liquefied ammonia and other gases by using high pressures and low temperatures, and in 1834, an American expatriate in Great Britain, Jacob Perkins , built the first working vapor-compression refrigeration system. It was a closed-cycle device that could operate continuously. A similar attempt was made in 1842, by American physician, John Gorrie , who built
7906-408: The Brookeville Academy (initially a boys' school), a post office, a blacksmith's shop, St. Luke's Episcopal Church, Salem Methodist Protestant Church, and a number of shops. Newlin's Mill, located on the west side of town, processed high-quality castor oil and ground limestone for plaster . Thomas Mill was located on the east side of town. To transport goods more easily to markets in Washington, D.C.,
8040-419: The Brookeville area in 2006 was $ 546,500, which compares to $ 475,000 for all of Montgomery County, and $ 243,750 for the entire United States. The population in the Brookeville area is well-educated, with 57.6% of those age 25 or older having a college education , which compares to the national average of 24.4%. The median household income is $ 103,879, compared to a national average of $ 41,994. Per capita income
8174-603: The Brookeville area. During the American Civil War , George B. McClellan sent Union troops (the First and Ninth Corps) through Brookeville, on their way to Antietam . This was one of three groups of troops that came from different directions towards Antietam. The Quakers played an instrumental role in aiding escaped slaves on the Underground Railroad . Nearby Sandy Spring was an important stop. Historians suggest that
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#17328556614338308-670: The Madison House was also used as a stop on the Underground Railroad during the Civil War. Part of the Madison House once served as the town's post office. A false stone wall in the room hid a staircase that descended in two directions, including into a hidden area in the basement where escaped slaves could hide. In 1910, the Salem United Methodist Church was built to replace a church that had been destroyed by fire, and
8442-524: The Patuxent River, and into Howard County. Georgia Avenue, which begins in Washington, D.C., is a two-lane road when it passes through Brookeville, with a stop sign and tight turn that takes it through the historic district. In 1989, the road carried 8,000 vehicles daily, a number which had increased to 18,000 vehicles each weekday as of 2007. The traffic mainly consists of commuters from Carroll County and Howard County. The traffic volume on Georgia Avenue
8576-567: The Technological University Munich in Germany, patented an improved method of liquefying gases in 1876, creating the first reliable and efficient compressed-ammonia refrigerator. His new process made possible the use of gases such as ammonia (NH 3 ), sulfur dioxide (SO 2 ) and methyl chloride (CH 3 Cl) as refrigerants, which were widely used for that purpose until the late 1920s despite safety concerns. In 1895 he discovered
8710-501: The United States in 1940. Frozen foods, previously a luxury item, became commonplace. In 1955 the domestic deep freezer, which was cold enough to allow the owners to freeze fresh food themselves rather than buying food already frozen with Clarence Birdseye's process, went on sale. There are walk in freezers, as the name implies, they allow for one to walk into the freezer. Safety regulations requires an emergency releases and employers should check to ensure no one will trapped inside when
8844-407: The age of 18 living with them, 53.4% were married couples living together, 11.3% had a female householder with no husband present, 31.4% were non-families, and 25.0% of all households were made up of individuals. The average household size was 2.70 and the average family size was 3.22. The median age was 38.5 years. The median income for a household in the county was $ 93,373 and the median income for
8978-679: The banks of the Barwon River at Rocky Point in Geelong , Victoria , and his first commercial ice-making machine followed in 1854. Harrison also introduced commercial vapor-compression refrigeration to breweries and meat packing houses, and by 1861, a dozen of his systems were in operation. The first gas absorption refrigeration system (compressor-less and powered by a heat-source) was developed by Edward Toussaint of France in 1859 and patented in 1860. It used gaseous ammonia dissolved in water ("aqua ammonia"). Carl von Linde , an engineering professor at
9112-514: The basic style since the 1940s, until modern, side-by-side refrigerators broke the trend. A vapor compression cycle is used in most household refrigerators, refrigerator–freezers and freezers. Newer refrigerators may include automatic defrosting , chilled water, and ice from a dispenser in the door. Domestic refrigerators and freezers for food storage are made in a range of sizes. Among the smallest are Peltier-type refrigerators designed to chill beverages. A large domestic refrigerator stands as tall as
9246-613: The box air cold. Note that the cool air in the refrigerator or freezer is still warmer than the refrigerant in the evaporator. Refrigerant leaves the evaporator, now fully vaporized and slightly heated, and returns to the compressor inlet to continue the cycle. Modern domestic refrigerators are extremely reliable because motor and compressor are integrated within a welded container, "sealed unit", with greatly reduced likelihood of leakage or contamination. By comparison, externally-coupled refrigeration compressors, such as those in automobile air conditioning, inevitably leak fluid and lubricant past
9380-584: The church cemetery has been there since the mid-19th century. By 1900, the mills and shops had shut down, and Brookeville remained a residential town. In 1915, the Bentley family sold the Madison House to Roger Brooke, a leader of the Quaker community. The house later changed hands, owned for some time by Elisha Hall, a principal at the Brookeville Academy, banker Remus Riggs, and Gene Archer, an NBC television personality. The automobile gave people more mobility and changed
9514-432: The common home models. They used gas systems such as ammonia (R-717) or sulfur dioxide (R-764), which occasionally leaked, making them unsafe for home use. Practical household refrigerators were introduced in 1915 and gained wider acceptance in the United States in the 1930s as prices fell and non-toxic, non-flammable synthetic refrigerants such as Freon-12 (R-12) were introduced. However, R-12 proved to be damaging to
9648-409: The compressor as high-pressure superheated vapor. The superheated vapor travels under pressure through coils or tubes that make up the condenser ; the coils or tubes are passively cooled by exposure to air in the room. The condenser cools the vapor, which liquefies. As the refrigerant leaves the condenser, it is still under pressure but is now only slightly above room temperature. This liquid refrigerant
9782-564: The compressor motor in a typical refrigerator. A fan or pump might be the only mechanical moving parts; reliance on convection is considered impractical. Other uses of an absorption refrigerator (or "chiller") include large systems used in office buildings or complexes such as hospitals and universities. These large systems are used to chill a brine solution that is circulated through the building. The Peltier effect uses electricity to pump heat directly; refrigerators employing this system are sometimes used for camping, or in situations where noise
9916-568: The council are Democrats. The council meets weekly at the county seat of Rockville—the 6th Floor of the Stella B. Werner Council Office Building. The members of the County Council as of 2023 are: The most recent Republican serving on the Montgomery County Council, Howard A. Denis of District 1 (Potomac/Bethesda), lost re-election in 2006. Since then, all Council members have been Democrats. The Montgomery County Police Department (MCPD) provides
10050-619: The county include the National Oceanic and Atmospheric Administration (NOAA), Nuclear Regulatory Commission (NRC), U.S. Department of Energy (DOE), the National Institute of Standards and Technology (NIST), the Walter Reed National Military Medical Center (WRNMMC), and the U.S. Consumer Product Safety Commission (CPSC). Downtown Bethesda and Silver Spring are the largest urban business hubs in
10184-561: The county was 65.0% white, 15.1% Black or African American, 11.3% Asian, 0.3% American Indian, 0.1% Pacific islander, 5.0% from other races, and 3.5% from two or more races. Those of Hispanic or Latino origin made up 11.5% of the population. There were 324,565 households, of which 35% had children under the age of 18 living with them, 55.2% were married couples living together, 10.5% had a female householder with no husband present, and 30.9% were non-families. Of all households, 24.4% were made up of individuals, and 7.7% had someone living alone who
10318-498: The county was created from lands that had at one point or another been part of Frederick County . On September 6, 1776, Thomas Sprigg Wootton from Rockville, Maryland, introduced legislation, while serving at the Maryland Constitutional Convention, to create lower Frederick County as Montgomery County. The name, Montgomery County, along with the founding of Washington County, Maryland, after George Washington ,
10452-435: The county's population. Over 52,000 people of Salvadoran descent lived in Montgomery County, with Salvadoran Americans comprising approximately 32% of the county's Hispanic and Latino population. People of South American descent make up 3.8% of the county, with Peruvian Americans being the largest South American community, constituting 1.2% of the county's population. Of the 357,086 households, 35.7% had children under
10586-506: The county's residents are affiliated with a religion . Montgomery County was named the most religiously diverse county in the United States in 2023 by the Public Religion Research Institute 's census. Counties were given a diversity index between 0 and 1, with 0 signifying no diversity, and 1 signifying complete diversity. Montgomery County earned a .886, higher than the national average of .615. Montgomery County has
10720-470: The county; combined, they rival many major city cores. According to the county's comprehensive annual financial reports , the top employers by number of employees in the county are the following. "NR" indicates the employer was not ranked among the top ten employers that year. Montgomery County was granted a charter form of government in 1948. The present County Executive / County Council form of government of Montgomery County dates to November 1968 when
10854-416: The drink. The county stopped issuing liquor licenses to all other restaurants under a law that had existed since Prohibition . Refrigerator A refrigerator , commonly fridge , is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside
10988-455: The east of Brookeville. Patuxent River State Park is used for hunting, fishing, hiking and horseback riding. Rachel Carson Conservation Park, located to the north, is undeveloped and has a number of hiking trails. The Triadelphia Reservoir, created by the Brighton Dam, is located on the Patuxent River. The Washington Suburban Sanitary Commission maintains 6,000 acres (24 km), in and around
11122-408: The energy. In 1913, the first electric refrigerators for home and domestic use were invented and produced by Fred W. Wolf of Fort Wayne, Indiana, with models consisting of a unit that was mounted on top of an ice box. His first device, produced over the next few years in several hundred units, was called DOMELRE . In 1914, engineer Nathaniel B. Wales of Detroit, Michigan, introduced an idea for
11256-481: The far northern tip of the county that is several miles long and averages less than 200 yards wide. In fact, a single house on Lakeview Drive and its yard is sectioned by this sliver into three portions, each separately contained within Montgomery, Frederick and Howard counties. These jurisdictions and Carroll County meet at a single point at Parr's Spring on Parr's Ridge . Montgomery County lies within
11390-403: The federal government and troops fled the capital. President James Madison first fled to Virginia , but then turned north. He arrived in Rockville at 6 p.m. on August 26, 1814, expecting to find General William H. Winder and his troops. They had already proceeded on towards Baltimore , however. Madison continued eastward and arrived in Brookeville on horseback. He reportedly carried with him
11524-591: The first county sheriff's office in Maryland to be so. The MCSO has authorized over 165 employees consisting of sworn law enforcement officers and civilian support staff. The office is headed by the sheriff, who has been elected every four years since the 1920s. The current Sheriff is Maxwell C. Uy (D), elected in 2022. Uy is the 62nd Sheriff and the first Asian American to hold that office. Several cities including Rockville and Gaithersburg maintain their own police departments to complement MCPD. Maryland State Police patrol
11658-599: The first instance to hide our heads; but shall look for a place on my arrival. The Oakley Farm, located on the western edge of Brookeville, thrived during the 18th and 19th centuries. Log cabins , dating from the 1820s, were built on the Oakley/Dorsey farm, to house slaves and later free black families. The Oakley Cabin is now maintained by the Montgomery County Department of Parks. A number of other 18th and 19th century cabins still exist on private property in
11792-668: The first large Hungarian cold store (with a capacity of 3,000 tonnes, the largest in Europe) opened in Tóth Kálmán Street, Budapest, the machine was manufactured by the Ganz Works . Until nationalisation after the Second World War, large-scale industrial refrigerator production in Hungary was in the hands of Röck and Ganz Works. Commercial refrigerator and freezer units, which go by many other names, were in use for almost 40 years prior to
11926-520: The first refrigerator with any type of automatic control. The absorption refrigerator was invented by Baltzar von Platen and Carl Munters from Sweden in 1922, while they were still students at the Royal Institute of Technology in Stockholm. It became a worldwide success and was commercialized by Electrolux . Other pioneers included Charles Tellier , David Boyle, and Raoul Pictet . Carl von Linde
12060-497: The first to invent a form of cooler utilizing the principles of evaporative cooling and radiative cooling called yakhchāls . These complexes used subterranean storage spaces, a large thickly insulated above-ground domed structure, and outfitted with badgirs (wind-catchers) and series of qanats (aqueducts). Pre-electric refrigeration In modern times, before the invention of the modern electric refrigerator, icehouses and iceboxes were used to provide cool storage for most of
12194-469: The fiscal year ending June 30, 2021. The office of the county executive was established in 1970. The first executive was James P. Gleason. The current executive is Marc Elrich, who was sworn in for his first term on December 3, 2018. The County Council is the legislative branch of Montgomery County. It has eleven members who serve four-year terms. All are elected at the same time by the voters of Montgomery County. As of January 2023, all 11 members on
12328-415: The freezer temperature will have no effect on the refrigerator temperature. The freezer control may also be adjusted to compensate for any refrigerator adjustment. This means the refrigerator may become too warm. However, because only enough air is diverted to the refrigerator compartment, the freezer usually re-acquires the set temperature quickly, unless the door is opened. When a door is opened, either in
12462-738: The full spectrum of policing services to the entire county. It was founded in 1922 and is headquartered in Gaithersburg, Maryland . It consists of around 1,300 sworn officers and 650 support personnel, split into 6 districts throughout the county. The department also provides assistance to other nearby departments, such as the Metropolitan Police Department of the District of Columbia and the Prince George's County Police Department , if requested. The Montgomery County Sheriff's Office (MCSO)
12596-524: The government, handling street maintenance and other matters, as well as town planning . The town adopted a Historic Preservation Ordinance in 1986, which guides town planning and restricts development within the town. The town commission consists of three members, who are elected for two-year terms. Michael Acierno was elected in May 2007 as president of the Brookeville Town Commission. Brookeville
12730-460: The home until after World War II. The 1950s and 1960s saw technical advances like automatic defrosting and automatic ice making. More efficient refrigerators were developed in the 1970s and 1980s, even though environmental issues led to the banning of very effective (Freon) refrigerants. Early refrigerator models (from 1916) had a cold compartment for ice cube trays. From the late 1920s fresh vegetables were successfully processed through freezing by
12864-462: The inventor of the first refrigerator , and coining the term. He created a portable contraption to transport butter and other products to sell at markets in Washington. His products commanded a high price, due to the extra freshness of the products at the market. Moore lived near the town, at Longwood Manor, which was built in 1817. During the War of 1812 , when the British burned parts of Washington, D.C.,
12998-479: The labor force are government workers. As of the census of 2010, there were 134 people, 54 households, and 38 families residing in the town. The population density was 1,116.7 inhabitants per square mile (431.2/km). There were 57 housing units at an average density of 475.0 per square mile (183.4/km). The racial makeup of the town was 88.8% White , 1.5% Asian , 4.5% from other races , and 5.2% from two or more races. Hispanic or Latino of any race were 11.2% of
13132-518: The largest Jewish population in the state of Maryland, accounting for 45% of Maryland Jews. According to the Berman Jewish DataBank , Montgomery County has a Jewish population of 105,400 people, around 10% of the county's population. The Washington metropolitan area , with 295,500 Jews, has become the third-largest Jewish population in the United States. As of 2020, Montgomery County is home to 776 religious congregations. Montgomery County
13266-513: The market for electric refrigerators. Also in 1923 Frigidaire introduced the first self-contained unit. About this same time porcelain-covered metal cabinets began to appear. Ice cube trays were introduced more and more during the 1920s; up to this time freezing was not an auxiliary function of the modern refrigerator. The first refrigerator to see widespread use was the General Electric "Monitor-Top" refrigerator introduced in 1927, so-called, by
13400-493: The market, with the nearby town of Olney taking prominence over Brookeville. Since the 1950s, Olney has rapidly developed, putting pressure on Brookeville. The Brookeville Historic District was placed on the National Register of Historic Places in 1979. Brookeville's historic designation has helped it retain historic character. Brookeville is located in northeastern Montgomery County, Maryland, 3 miles (5 km) west of
13534-414: The mid-1750s, and developed in the early 1800s. In 1834, the first working vapor-compression refrigeration , using the same technology seen in air conditioners , system was built. The first commercial ice-making machine was invented in 1854. In 1913, refrigerators for home use were invented. In 1923 Frigidaire introduced the first self-contained unit. The introduction of Freon in the 1920s expanded
13668-420: The minimum amount of MPDUs are rewarded with permission to increase the density of their developments, which allows them to build more housing and generate more revenue . Montgomery County was one of the first counties in the U.S. to adopt such a plan, but many other areas have since followed suit. Montgomery County is by far one of the most ethnically and culturally diverse counties in the United States; four of
13802-399: The more humid refrigerator air is mixed with the dry freezer air. Multiple manufacturers offer dual compressor models. These models have separate freezer and refrigerator compartments that operate independently of each other, sometimes mounted within a single cabinet. Each has its own separate compressor, condenser and evaporator coils, insulation, thermostat, and door. A hybrid between
13936-598: The most efficient, instead of the Energy Star. For US refrigerators, the Consortium on Energy Efficiency (CEE) further differentiates between Energy Star qualified refrigerators. Tier 1 refrigerators are those that are 20% to 24.9% more efficient than the Federal minimum standards set by the National Appliance Energy Conservation Act (NAECA). Tier 2 are those that are 25% to 29.9% more efficient. Tier 3
14070-403: The northern portions of the humid subtropical climate . It has four distinct seasons, including hot, humid summers and cool winters. Precipitation is fairly evenly distributed throughout the year, with an average of 43 inches (110 cm) of rainfall. Thunderstorms are common during the summer months, and account for the majority of the average 35 days with thunder per year. Heavy precipitation
14204-455: The only minority-majority state on the East Coast. As of the 2010 United States census , there were 971,777 people, 357,086 households, and 244,898 families living in the county. The population density was 1,978.2 inhabitants per square mile (763.8/km ). There were 375,905 housing units at an average density of 765.2 per square mile (295.4/km ). The racial makeup of the county
14338-437: The population. There were 54 households, of which 33.3% had children under the age of 18 living with them, 66.7% were married couples living together, 1.9% had a female householder with no husband present, 1.9% had a male householder with no wife present, and 29.6% were non-families. 22.2% of all households were made up of individuals, and 9.3% had someone living alone who was 65 years of age or older. The average household size
14472-412: The population. The median age was 39 years. The median income for a household in the town was $ 88,629, and the median income for a family was $ 93,444. The per capita income for the town was $ 43,483. There were 7.1% of families and 5.5% of the population living below the poverty line . The larger area defined as Brookeville by the postal service, within the 20833 ZIP Code, has a population of 6,259 as of
14606-478: The poverty line, including 4.6% of those under age 18 and 4.6% of those age 65 or over. Of Montgomery County's residents, 14% are Catholic , 5% are Baptist , 3% are Methodist , 1% are Presbyterian , 1% are Episcopalian , 1% are part of the Latter Day Saint movement , 1% are Lutheran , 6% are of another Christian faith, 3% are Jewish , 1% follows Islam , and 1% are of an eastern faith . Overall, 41% of
14740-472: The public, because of its resemblance to the gun turret on the ironclad warship USS Monitor of the 1860s. The compressor assembly, which emitted a great deal of heat, was placed above the cabinet, and enclosed by a decorative ring. Over a million units were produced. As the refrigerating medium, these refrigerators used either sulfur dioxide , which is corrosive to the eyes and may cause loss of vision, painful skin burns and lesions, or methyl formate , which
14874-440: The record high is 105 °F (41 °C) in 1954, while the record low is −13 °F (−25 °C). Lower elevations in the south, such as Silver Spring , receive an average of 17.5 inches (44 cm) of snowfall per year. Higher elevations in the north, such as Damascus , receive an average of 21.3 inches (54 cm) of snowfall per year. During a particularly snowy winter, Damascus received 79 inches (200 cm) during
15008-621: The refrigerator compartment. Domestic freezers can be included as a separate compartment in a refrigerator, or can be a separate appliance. Domestic freezers may be either upright, resembling a refrigerator, or chest freezers , wider than tall with the lid or door on top, sacrificing convenience for efficiency and partial immunity to power outages. Many modern upright freezers come with an ice dispenser built into their door. Some upscale models include thermostat displays and controls. Home freezers as separate compartments (larger than necessary just for ice cubes), or as separate units, were introduced in
15142-412: The refrigerator gets too warm, the thermostat starts the cooling process and a fan circulates the air around the freezer. During this time, the refrigerator also gets colder. The freezer control knob only controls the amount of air that flows into the refrigerator via a damper system. Changing the refrigerator temperature will inadvertently change the freezer temperature in the opposite direction. Changing
15276-438: The refrigerator market during the 1930s. Home freezers as separate compartments (larger than necessary just for ice cubes) were introduced in 1940. Frozen foods , previously a luxury item, became commonplace. Freezer units are used in households as well as in industry and commerce. Commercial refrigerator and freezer units were in use for almost 40 years prior to the common home models. The freezer-over-refrigerator style had been
15410-420: The refrigerator or the freezer, the fan in some units stops immediately to prevent excessive frost build up on the freezer's evaporator coil, because this coil is cooling two areas. When the freezer reaches temperature, the unit cycles off, no matter what the refrigerator temperature is. Modern computerized refrigerators do not use the damper system. The computer manages fan speed for both compartments, although air
15544-458: The reservoir, which are open to the public for recreational purposes. The reservoir is a popular recreation spot that is suitable for fishing, kayaking, and other activities. Mount Zion Park is a small park with playgrounds, ball fields, tennis courts, and picnic facilities. Within the town limits, Powers' Woods Park is a new 2-acre (8,100 m) park that is slated to be located near a recently restored one-room schoolhouse. The climate in this area
15678-675: The school facilities to the Civil Defense Administration, which used it for military training. The school was vacated in 1963, and remained vacant until 1978, when it was converted into a community recreation center. The Longwood Recreation Center is run by the Montgomery County Recreation Department. Brookeville is now part of the Montgomery County Public Schools system, and is served by Sherwood High School, which first opened in 1883 as
15812-454: The shaft seals. This leads to a requirement for periodic recharging and, if ignored, possible compressor failure. Refrigerators with two compartments need special design to control the cooling of refrigerator or freezer compartments. Typically, the compressors and condenser coils are mounted at the top of the cabinet, with a single fan to cool them both. This arrangement has a few downsides: each compartment cannot be controlled independently and
15946-403: The south, it intersects Interstate 495 before ending at U.S. Route 29 just outside of Washington, D.C. The name "Georgia Avenue" follows US 29 south into the city. Montgomery County, Maryland Montgomery County is the most populous county in the U.S. state of Maryland . As of the 2020 census , the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat
16080-478: The ten most culturally diverse cities and towns in the U.S. are in Montgomery County: Gaithersburg , ranking second; Germantown , ranking third; Silver Spring , ranking fourth; and Rockville , ranking ninth. Gaithersburg, Germantown, and Silver Spring all rank as more culturally diverse than New York City , San Jose , and Oakland . Maryland overall is one of six minority-majority states, and
16214-470: The two designs is using a separate fan for each compartment, the Dual Fan approach. Doing so allows for separate control and airflow on a single compressor system. An absorption refrigerator works differently from a compressor refrigerator, using a source of heat , such as combustion of liquefied petroleum gas , solar thermal energy or an electric heating element. These heat sources are much quieter than
16348-404: The unit gets locked as hypothermia is possible if one is in freezer for longer periods of time. A vapor compression cycle is used in most household refrigerators, refrigerator–freezers and freezers. In this cycle, a circulating refrigerant such as R134a enters a compressor as low-pressure vapor at or slightly below the temperature of the refrigerator interior. The vapor is compressed and exits
16482-406: The voters changed the form of government from a County Commission / County Manager system, as provided in the original 1948 home rule Charter. The County Commission/County Manager system was seen as inadequate for the growing population of the county who wanted more services assistance and accountability from the government. The Montgomery County government had a surplus of $ 654 million for
16616-530: The year. Placed near freshwater lakes or packed with snow and ice during the winter, they were once very common. Natural means are still used to cool foods today. On mountainsides, runoff from melting snow is a convenient way to cool drinks, and during the winter one can keep milk fresh much longer just by keeping it outdoors. The word "refrigeratory" was used at least as early as the 17th century. Artificial refrigeration The history of artificial refrigeration began when Scottish professor William Cullen designed
16750-406: Was 166 at the 2020 census . Brookeville is notable as the "United States Capital for a Day": when British troops burned Washington, D.C. , during the War of 1812 , President James Madison sought refuge in the town on August 26, 1814. During the American Civil War , Brookeville, along with nearby Sandy Spring , was a stop on the Underground Railroad . The U.S. Postal Service (USPS) defines
16884-450: Was 2.48 and the average family size was 2.95. The median age in the town was 46.3 years. 22.4% of residents were under the age of 18; 4.4% were between the ages of 18 and 24; 20.9% were from 25 to 44; 38% were from 45 to 64; and 14.2% were 65 years of age or older. The gender makeup of the town was 53.7% male and 46.3% female. Brookeville was incorporated as a town in 1808 and the charter formally issued in 1890. Town commissioners oversee
17018-542: Was 57.5% White, 17.2% Black or African American, 13.9% Asian, 0.4% American Indian, 0.1% Pacific islander, 7.0% from other races, and 4.0% from two or more races. Those of Hispanic or Latino origin made up 17.0% of the population. In terms of ancestry, 10.7% were German , 9.6% were Irish , 7.9% were English , 4.9% were Italian , 3.5% were Russian , 3.1% were Polish , 2.9% were American and 2% were French . People of Central American descent made up 8.1% of Montgomery County, with Salvadoran Americans constituting 5.4% of
17152-522: Was 65 years of age or older. The average household size was 2.66 and the average family size was 3.19. 25.4% of the population was under the age of 18, 6.9% from 18 to 24, 32.3% from 25 to 44, 24.2% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 92.1 males. For every 100 females age 18 and over, there were 88.1 males. In 2000, there were 334,632 housing units at an average density of 675 per square mile (261/km ). Montgomery County has
17286-418: Was centered near Spencerville, Maryland . When Montgomery County was created in 1776, its boundaries were defined as "beginning at the east side of the mouth of Rock Creek on Potomac river [sic], and running with the said river to the mouth of Monocacy , then with a straight line to Par's spring, from thence with the lines of the county to the beginning". The county's boundary forms a sliver of land at
17420-545: Was nearly complete by the fall of 2022. Reddy Branch flows along the northern and eastern edges of the town. It is a tributary of the Hawlings River , which flows east to the Patuxent River downstream from the Triadelphia Reservoir . Reddy Branch Stream Valley Park is located along Brookeville Road, to the west of the town, and to the east along Brighton Dam Road. Hawling Hills Park and Patuxent River State Park are located along New Hampshire Avenue, north of Ashton and to
17554-593: Was the first time in American history that counties and provinces in the Thirteen Colonies were not named after British referents. The name use of Montgomery and Washington County were seen as further defiance to Great Britain during the American Revolutionary War . The county's nickname of "MoCo" is derived from " Mo ntgomery Co unty", in use as early as 2001. The county's motto, adopted in 1976,
17688-510: Was the first to patent and make a practical and compact refrigerator. These home units usually required the installation of the mechanical parts, motor and compressor, in the basement or an adjacent room while the cold box was located in the kitchen. There was a 1922 model that consisted of a wooden cold box, water-cooled compressor, an ice cube tray and a 0.25-cubic-metre (9 cu ft) compartment, and cost $ 714. (A 1922 Model-T Ford cost about $ 476.) By 1923, Kelvinator held 80 percent of
17822-511: Was under construction as of 2022. Brookeville is an affluent residential community, with a large portion of residents employed with the government or related professional jobs. The town is governed by a three-person town commission, while surrounding unincorporated areas are administered by the county. Historically, the Brookeville Academy was an important educational institution for the community. In 1883, Sherwood High School opened as
17956-498: Was within the Farquhar service area. Maryland Route 97 is the only state highway serving Brookeville directly. MD 97 follows High Street and Market Street within the town limits, becoming known as Georgia Avenue outside of town both to the north and south. After departing Brookeville, MD 97 heads north 10 miles (16 km) to a junction with Interstate 70 and U.S. Route 40 on its way to Westminster , while 12 miles (19 km) to
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