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99-555: The founding of the AIS was prompted by the growing popularity of irises as garden plants in America, spurred in part by an award-winning exhibit of iris cultivars at the 1915 Panama–Pacific International Exposition in San Francisco, in part by William Rickatson Dykes ' landmark 1913 book The Genus Iris , and in part by a small flood of articles in popular magazines like Country Life . The AIS

198-650: A Scottish inventor, built a small-scale prototype of a steam road locomotive in Birmingham . A full-scale rail steam locomotive was proposed by William Reynolds around 1787. An early working model of a steam rail locomotive was designed and constructed by steamboat pioneer John Fitch in the US during 1794. Some sources claim Fitch's model was operable already by the 1780s and that he demonstrated his locomotive to George Washington . His steam locomotive used interior bladed wheels guided by rails or tracks. The model still exists at

297-635: A (newly identified) Killingworth Billy in 1816. He also constructed The Duke in 1817 for the Kilmarnock and Troon Railway , which was the first steam locomotive to work in Scotland. In 1825, Stephenson built Locomotion No. 1 for the Stockton and Darlington Railway , north-east England, which was the first public steam railway in the world. In 1829, his son Robert built in Newcastle The Rocket , which

396-473: A 3.84-mile (6.18 km) circuit set up around the Exposition grounds. The Smithsonian Institution also had an exhibition at the Exposition. Native American culture was a topic of interest during the nine-month long exposition with multiple attractions dedicated to Native American life. The most popular attraction at the exposition that depicted Native American life is James Earle Fraser's statue The End of

495-448: A balance has to be struck between obtaining sufficient draught for combustion whilst giving the exhaust gases and particles sufficient time to be consumed. In the past, a strong draught could lift the fire off the grate, or cause the ejection of unburnt particles of fuel, dirt and pollution for which steam locomotives had an unenviable reputation. Moreover, the pumping action of the exhaust has the counter-effect of exerting back pressure on

594-423: A campaigning platform for discussing women's rights and social issues. It was commonly argued that the fair celebrated male dominance over women by not providing a building for women. Also, men and women were depicted differently in artworks advertising the exposition. White women, specifically, were presented as caretakers while men as strong and powerful saviors, such as in the poster "13th Labor of Hercules." At

693-472: A combination of plaster and burlap fiber), almost all the fair's various buildings and attractions were pulled down in late 1915. Intended to fall into pieces at the close of the fair (reportedly because the architect believed every great city needed ruins), the only presently-surviving building on the Exposition grounds, Bernard Maybeck 's Palace of Fine Arts, remained in place, slowly falling into disrepair. The hall, used to display painting and sculpture during

792-483: A crankpin on the driving wheel ( Main driver in the US) or to a crank on a driving axle. The movement of the valves in the steam chest is controlled through a set of rods and linkages called the valve gear , actuated from the driving axle or from the crankpin; the valve gear includes devices that allow reversing the engine, adjusting valve travel and the timing of the admission and exhaust events. The cut-off point determines

891-545: A forest fire swept through the area in 2020, severely damaging the railroad, which has not run since then. The Legion of Honor Museum , in Lincoln Park , was the gift of Alma de Bretteville Spreckels , wife of the sugar magnate and thoroughbred racehorse owner/breeder Adolph B. Spreckels . The building is a full-scale replica of the French Pavilion from the 1915 Panama–Pacific International Exposition, which in turn

990-429: A gauge mounted in the cab. Steam pressure can be released manually by the driver or fireman. If the pressure reaches the boiler's design working limit, a safety valve opens automatically to reduce the pressure and avoid a catastrophic accident. The exhaust steam from the engine cylinders shoots out of a nozzle pointing up the chimney in the smokebox. The steam entrains or drags the smokebox gases with it which maintains

1089-481: A lower pressure in the smokebox than that under the firebox grate. This pressure difference causes air to flow up through the coal bed and keeps the fire burning. The search for thermal efficiency greater than that of a typical fire-tube boiler led engineers, such as Nigel Gresley , to consider the water-tube boiler . Although he tested the concept on the LNER Class W1 , the difficulties during development exceeded

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1188-433: A lower reciprocating mass than three, four, five or six coupled axles. They were thus able to turn at very high speeds due to the lower reciprocating mass. A trailing axle was able to support a huge firebox, hence most locomotives with the wheel arrangement of 4-4-2 (American Type Atlantic) were called free steamers and were able to maintain steam pressure regardless of throttle setting. The chassis, or locomotive frame ,

1287-594: A more anthropological light versus this American ideal. During the Panama–Pacific International Exposition women were in charge of their own board, known as the Woman's Board of San Francisco's Panama–Pacific International Exposition. The board, also called the Board of Lady Managers, allowed women to take part in organizing different aspects of the fair and more importantly gave them the opportunity to have

1386-630: A number of Swiss steam shunting locomotives were modified to use electrically heated boilers, consuming around 480 kW of power collected from an overhead line with a pantograph . These locomotives were significantly less efficient than electric ones ; they were used because Switzerland was suffering a coal shortage because of the War, but had access to plentiful hydroelectricity . A number of tourist lines and heritage locomotives in Switzerland, Argentina and Australia have used light diesel-type oil. Water

1485-456: A number of important innovations that included using high-pressure steam which reduced the weight of the engine and increased its efficiency. Trevithick visited the Newcastle area in 1804 and had a ready audience of colliery (coal mine) owners and engineers. The visit was so successful that the colliery railways in north-east England became the leading centre for experimentation and development of

1584-459: A rigid frame with a 30% weight reduction. Generally, the largest locomotives are permanently coupled to a tender that carries the water and fuel. Often, locomotives working shorter distances do not have a tender and carry the fuel in a bunker, with the water carried in tanks placed next to the boiler. The tanks can be in various configurations, including two tanks alongside ( side tanks or pannier tanks ), one on top ( saddle tank ) or one between

1683-401: A tank in the locomotive tender or wrapped around the boiler in the case of a tank locomotive . Periodic stops are required to refill the tanks; an alternative was a scoop installed under the tender that collected water as the train passed over a track pan located between the rails. While the locomotive is producing steam, the amount of water in the boiler is constantly monitored by looking at

1782-513: A thousand United States dollars . The United States Congress authorized the San Francisco Mint (also known as "The Granite Lady") to issue a series of five commemorative coins . Said coins were the 1915-S silver Panama-Pacific half dollar and four gold coins. The denominations of the gold coins were $ 1, $ 2 + 1 ⁄ 2 (quarter eagle) and $ 50 (in two types: a round coin, and an unusual octagonal coin). The Panama-Pacific coins have

1881-599: A tribe of Carmel Indians." While the demise of Native American people was a rhetoric created by fair organizers, scholars have argued that in reality, the Native persona was very present and did not reflect the idea that it was a disappearing civilization. Native Americans were in fact part of the fair, but also attended as visitors, performers, and workers. More recently, scholars have focused on Native representation in San Francisco's 1915 rival world fair, San Diego's 1915 Panama–California Exposition, that showed Native American life in

1980-405: Is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam . It is fuelled by burning combustible material (usually coal , oil or, rarely, wood ) to heat water in the locomotive's boiler to the point where it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels. In most locomotives, the steam

2079-449: Is admitted alternately to each end of its cylinders in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on the locomotive itself or in a tender coupled to it. Variations in this general design include electrically powered boilers, turbines in place of pistons, and using steam generated externally. Steam locomotives were first developed in

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2178-475: Is crucial to the efficiency of any steam locomotive, and the internal profiles of the chimney (or, strictly speaking, the ejector ) require careful design and adjustment. This has been the object of intensive studies by a number of engineers (and often ignored by others, sometimes with catastrophic consequences). The fact that the draught depends on the exhaust pressure means that power delivery and power generation are automatically self-adjusting. Among other things,

2277-419: Is directed upwards out of the locomotive through the chimney, by way of a nozzle called a blastpipe , creating the familiar "chuffing" sound of the steam locomotive. The blastpipe is placed at a strategic point inside the smokebox that is at the same time traversed by the combustion gases drawn through the boiler and grate by the action of the steam blast. The combining of the two streams, steam and exhaust gases,

2376-415: Is the principal structure onto which the boiler is mounted and which incorporates the various elements of the running gear. The boiler is rigidly mounted on a "saddle" beneath the smokebox and in front of the boiler barrel, but the firebox at the rear is allowed to slide forward and backwards, to allow for expansion when hot. European locomotives usually use "plate frames", where two vertical flat plates form

2475-579: The Pioneer Mother .   The National Society Colonial Dames XVII Century was established by six women while attending the exposition. The centerpiece was the Tower of Jewels , which rose to 435 feet (133 m) and was covered with over 100,000 cut glass Novagems . The 3 ⁄ 4 -to-2-inch (19 to 51 mm) colored "gems" sparkled in sunlight throughout the day and were illuminated by over 50 powerful electrical searchlights at night. South of

2574-874: The Drache , was delivered in 1848. The first steam locomotives operating in Italy were the Bayard and the Vesuvio , running on the Napoli-Portici line, in the Kingdom of the Two Sicilies. The first railway line over Swiss territory was the Strasbourg – Basel line opened in 1844. Three years later, in 1847, the first fully Swiss railway line, the Spanisch Brötli Bahn , from Zürich to Baden

2673-574: The Ohio Historical Society Museum in Columbus, US. The authenticity and date of this locomotive is disputed by some experts and a workable steam train would have to await the invention of the high-pressure steam engine by Richard Trevithick , who pioneered the use of steam locomotives. The first full-scale working railway steam locomotive was the 3 ft ( 914 mm ) gauge Coalbrookdale Locomotive built by Trevithick in 1802. It

2772-528: The Panama Canal (2¢), the Golden Gate (5¢), and the discovery of San Francisco Bay (10¢). The stamps were first put on sale in 1913, to promote the coming event, and perforated 12, and then reissued in 1914 and 1915, perforated 10. Their prices today range widely; the 2¢ of 1913 is available for under a dollar in used condition, while an unused 10¢ of the scarcer orange-yellow variety in 1915 can be worth up to

2871-587: The Pennsylvania Railroad class S1 achieved speeds upwards of 150 mph, though this was never officially proven. In the United States, larger loading gauges allowed the development of very large, heavy locomotives such as the Union Pacific Big Boy , which weighs 540 long tons (550  t ; 600 short tons ) and has a tractive effort of 135,375 pounds-force (602,180 newtons). Beginning in

2970-520: The United Kingdom during the early 19th century and used for railway transport until the middle of the 20th century. Richard Trevithick built the first steam locomotive known to have hauled a load over a distance at Pen-y-darren in 1804, although he produced an earlier locomotive for trial at Coalbrookdale in 1802. Salamanca , built in 1812 by Matthew Murray for the Middleton Railway ,

3069-657: The "Peace Palace", a transformation of the Civic Auditorium (now the Bill Graham Civic Auditorium ). May Wright Sewall , by appointment of Charles C. Moore , chair of the exposition, organized the peace conference. It was attended by women pacificists from all over the world, especially the neutral countries of World War I . One of the most memorable achievements of the Women's Board was the installation of statues that celebrated women, specifically mothers, known as

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3168-649: The AIS); horticulturist Louisa Boyd Yeomans King of the Garden Club of America ; horticulturist Ethel Anson Peckham , who managed the Bronx Park Iris Trial Gardens; garden book author Louise Beebe Wilder ; Mary Helen Wingate Lloyd , creator of an "iris bowl" garden in Pennsylvania; and others. Several founding members came from the world of peony fanciers, including Lee R. Bonnewitz, a nurseryman and president of

3267-485: The American Iris Society . Even before the AIS was founded, Wister started compiling a checklist of iris cultivars as the first step in efforts to reduce confusion around iris nomenclature. The AIS also established a registry to track cultivars. In 1922 and 1923, issues of the bulletin carried successive version of the AIS's preliminary checklist. Two large checklists were published as books in 1929 and 1939 under

3366-529: The American Peony Society; W. F. Christman, secretary of the Northwestern Peony and Iris Society; and chemistry professor A.P. Saunders, who edited the bulletin of the peony society. The AIS was organized as a consortium of six regional subgroups, and it incorporated in 1927. There are now 22 regions covering the United States and Canada. It publishes a regular newsletter, Irises: The Bulletin of

3465-689: The Dykes Memorial Medal (its highest honor); the John C. Wister Medal; the Williamson-White Medal, and some dozen others. The New York Botanical Garden holds an archive of records relating to the founding of the AIS. Panama%E2%80%93Pacific International Exposition The Panama–Pacific International Exposition was a world's fair held in San Francisco , California, United States, from February 20 to December 4, 1915. Its stated purpose

3564-516: The Fair, was repurposed as a garage for jeeps during World War II . The Palace, including the colonnade with its signature weeping women and rotunda dome, was completely reconstructed in the 1960s and a seismic retrofit was completed in early 2009. The Exploratorium , an interactive science museum, occupied the northern 2/3 of the Palace from 1969 to 2013; the city-owned Palace of Fine Arts Theater, has occupied

3663-559: The Native community, can be seen through artworks such as The End of the Trail and The Pioneer or tributes to Francisco Pizarro and Hernán Cortés. In comparison to previous world fairs, the Panama–Pacific International Exposition showcased Native Americans more as nobles rather than savage people, but who were still inevitably destined to become extinct. These ideas were presented in plays, known as pageants, where Native Americans played small roles such as in "Catalonian dragoons, muleteers, and

3762-615: The Palaces of Food Products, Agriculture, Liberal Arts, and Education and Social Economy and surrounding the Court of the Four Seasons; and the Palaces of Transportation, Mines and Metallurgy, Varied Industries, and Manufacturers surrounding the Court of Abundance. The central court group was bookended on the east by the Palace of Machinery, the largest of all the halls built for the Exhibition, and on

3861-564: The Saar (today part of Völklingen ), but neither could be returned to working order after being dismantled, moved and reassembled. On 7 December 1835, the Adler ran for the first time between Nuremberg and Fürth on the Bavarian Ludwig Railway . It was the 118th engine from the locomotive works of Robert Stephenson and stood under patent protection. In Russia , the first steam locomotive

3960-664: The Tower, the Fountain of Energy flowed at the center of the South Gardens, flanked by the Palace of Horticulture on the west and the Festival Hall to the east. The arch of the Tower served as the gateway to the Court of the Universe, leading to the Court of the Four Seasons to the west and the Court of Abundance to the east. These courts formed the primary exhibit area for the fair, which included

4059-584: The Trail . Fraser's statue, which showed a Native American man slumped over on a horse, reflected the American idea at the time, that the Native American race was doomed for extinction. The exposition not only celebrated the completion of the Panama Canal, but also advances made by the American people, part of which were the conquests of indigenous people by Americans as well as Europeans. These celebrations over

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4158-423: The US), or screw-reverser (if so equipped), that controls the cut-off, therefore, performs a similar function to a gearshift in an automobile – maximum cut-off, providing maximum tractive effort at the expense of efficiency, is used to pull away from a standing start, whilst a cut-off as low as 10% is used when cruising, providing reduced tractive effort, and therefore lower fuel/water consumption. Exhaust steam

4257-599: The United States, including John Fitch's miniature prototype. A prominent full sized example was Col. John Steven's "steam wagon" which was demonstrated on a loop of track in Hoboken, New Jersey in 1825. Many of the earliest locomotives for commercial use on American railroads were imported from Great Britain, including first the Stourbridge Lion and later the John Bull . However, a domestic locomotive-manufacturing industry

4356-545: The adhesive weight. Equalising beams connecting the ends of leaf springs have often been deemed a complication in Britain, however, locomotives fitted with the beams have usually been less prone to loss of traction due to wheel-slip. Suspension using equalizing levers between driving axles, and between driving axles and trucks, was standard practice on North American locomotives to maintain even wheel loads when operating on uneven track. Locomotives with total adhesion, where all of

4455-402: The boiler materials to the point where it needs to be rebuilt or replaced. Start-up on a large engine may take hours of preliminary heating of the boiler water before sufficient steam is available. Although the boiler is typically placed horizontally, for locomotives designed to work in locations with steep slopes it may be more appropriate to consider a vertical boiler or one mounted such that

4554-404: The boiler remains horizontal but the wheels are inclined to suit the slope of the rails. The steam generated in the boiler fills the space above the water in the partially filled boiler. Its maximum working pressure is limited by spring-loaded safety valves. It is then collected either in a perforated tube fitted above the water level or by a dome that often houses the regulator valve, or throttle,

4653-399: The boiler. Boiler water surrounds the firebox to stop the metal from becoming too hot. This is another area where the gas transfers heat to the water and is called the firebox heating surface. Ash and char collect in the smokebox as the gas gets drawn up the chimney ( stack or smokestack in the US) by the exhaust steam from the cylinders. The pressure in the boiler has to be monitored using

4752-592: The creation of a series of commemorative medals, an award medal, a souvenir medal, and diplomas. In 2015, the California Historical Society , the Maybeck Foundation, and Innovation Hangar partnered with the City and County of San Francisco to commemorate the centennial of the transformative 1915 Panama Pacific International Exposition. On June 20, 2015 a commemorative orchestra, chorus and band concert

4851-420: The distinction of being the first commemorative coins to bear the motto "In God We Trust", and were also the first commemoratives to be struck at a branch mint. The two lower denomination gold coins are scarce, while the two $ 50 ones are extremely rare. The silver half dollar had a mintage of 27,134 and in modestly worn condition is available for several hundred dollars. Numismatist Farran Zerbe supervised

4950-675: The dominant fuel worldwide in steam locomotives. Railways serving sugar cane farming operations burned bagasse , a byproduct of sugar refining. In the US, the ready availability and low price of oil made it a popular steam locomotive fuel after 1900 for the southwestern railroads, particularly the Southern Pacific. In the Australian state of Victoria, many steam locomotives were converted to heavy oil firing after World War II. German, Russian, Australian and British railways experimented with using coal dust to fire locomotives. During World War 2,

5049-440: The early 1900s, steam locomotives were gradually superseded by electric and diesel locomotives , with railways fully converting to electric and diesel power beginning in the late 1930s. The majority of steam locomotives were retired from regular service by the 1980s, although several continue to run on tourist and heritage lines. The earliest railways employed horses to draw carts along rail tracks . In 1784, William Murdoch ,

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5148-431: The exhaust gas volume was vented through a cooling tower, allowing the steam exhaust to draw more air past the radiator. Running gear includes the brake gear, wheel sets , axleboxes , springing and the motion that includes connecting rods and valve gear. The transmission of the power from the pistons to the rails and the behaviour of the locomotive as a vehicle, being able to negotiate curves, points and irregularities in

5247-448: The firebox becomes exposed. Without water on top of the sheet to transfer away the heat of combustion , it softens and fails, letting high-pressure steam into the firebox and the cab. The development of the fusible plug , a temperature-sensitive device, ensured a controlled venting of steam into the firebox to warn the fireman to add water. Scale builds up in the boiler and prevents adequate heat transfer, and corrosion eventually degrades

5346-504: The frames ( well tank ). The fuel used depended on what was economically available to the railway. In the UK and other parts of Europe, plentiful supplies of coal made this the obvious choice from the earliest days of the steam engine. Until 1870, the majority of locomotives in the United States burned wood, but as the Eastern forests were cleared, coal gradually became more widely used until it became

5445-439: The genus. In 1971, an American Iris Society Foundation was established to foster research to improve the genus, to stimulate interest in the plant, and to sponsor publications about irises. The first project supported by the foundation was a revised edition of an AIS book, Garden Irises (issued in 1979 as The World of Irises ). The AIS gives out various annual awards for different categories of iris types and species, including

5544-418: The grate into an ashpan. If oil is used as the fuel, a door is needed for adjusting the air flow, maintaining the firebox, and cleaning the oil jets. The fire-tube boiler has internal tubes connecting the firebox to the smokebox through which the combustion gases flow transferring heat to the water. All the tubes together provide a large contact area, called the tube heating surface, between the gas and water in

5643-577: The highly mineralised water was available, and locomotive boilers were lasting less than a quarter of the time normally expected. In the days of steam locomotion, about half the total train load was water for the engine. The line's operator, Commonwealth Railways , was an early adopter of the diesel-electric locomotive . The fire-tube boiler was standard practice for steam locomotive. Although other types of boiler were evaluated they were not widely used, except for some 1,000 locomotives in Hungary which used

5742-625: The locomotive is now on static display at the California State Railroad Museum in Sacramento . A telephone line was also established to New York City so people across the continent could hear the Pacific Ocean . The Liberty Bell traveled by train on a nationwide tour from Philadelphia, Pennsylvania , to attend the exposition. The 1915 American Grand Prize and Vanderbilt Cup auto races were held February 27 and March 6 on

5841-657: The locomotive ran on a circular track in the factory yard. It was the first locomotive to be built on the European mainland and the first steam-powered passenger service; curious onlookers could ride in the attached coaches for a fee. It is portrayed on a New Year's badge for the Royal Foundry dated 1816. Another locomotive was built using the same system in 1817. They were to be used on pit railways in Königshütte and in Luisenthal on

5940-403: The main chassis, with a variety of spacers and a buffer beam at each end to form a rigid structure. When inside cylinders are mounted between the frames, the plate frames are a single large casting that forms a major support element. The axleboxes slide up and down to give some sprung suspension, against thickened webs attached to the frame, called "hornblocks". American practice for many years

6039-509: The mainframes. Locomotives with multiple coupled-wheels on a rigid chassis would have unacceptable flange forces on tight curves giving excessive flange and rail wear, track spreading and wheel climb derailments. One solution was to remove or thin the flanges on an axle. More common was to give axles end-play and use lateral motion control with spring or inclined-plane gravity devices. Railroads generally preferred locomotives with fewer axles, to reduce maintenance costs. The number of axles required

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6138-470: The moment when the valve blocks a steam port, "cutting off" admission steam and thus determining the proportion of the stroke during which steam is admitted into the cylinder; for example a 50% cut-off admits steam for half the stroke of the piston. The remainder of the stroke is driven by the expansive force of the steam. Careful use of cut-off provides economical use of steam and in turn, reduces fuel and water consumption. The reversing lever ( Johnson bar in

6237-826: The original John Bull was on static display in the National Museum of American History in Washington, D.C. The replica is preserved at the Railroad Museum of Pennsylvania . The first railway service outside the United Kingdom and North America was opened in 1829 in France between Saint-Etienne and Lyon ; it was initially limited to animal traction and converted to steam traction early 1831, using Seguin locomotives . The first steam locomotive in service in Europe outside of France

6336-468: The piston in turn. In a two-cylinder locomotive, one cylinder is located on each side of the vehicle. The cranks are set 90° out of phase. During a full rotation of the driving wheel, steam provides four power strokes; each cylinder receives two injections of steam per revolution. The first stroke is to the front of the piston and the second stroke to the rear of the piston; hence two working strokes. Consequently, two deliveries of steam onto each piston face in

6435-411: The purpose of which is to control the amount of steam leaving the boiler. The steam then either travels directly along and down a steam pipe to the engine unit or may first pass into the wet header of a superheater , the role of the latter being to improve thermal efficiency and eliminate water droplets suspended in the "saturated steam", the state in which it leaves the boiler. On leaving the superheater,

6534-418: The side of the piston receiving steam, thus slightly reducing cylinder power. Designing the exhaust ejector became a specific science, with engineers such as Chapelon , Giesl and Porta making large improvements in thermal efficiency and a significant reduction in maintenance time and pollution. A similar system was used by some early gasoline/kerosene tractor manufacturers ( Advance-Rumely / Hart-Parr ) –

6633-521: The southern 1/3 since 1970. Several other buildings were saved immediately following the Exposition, including the California, Missouri, and Philippine buildings, which were built on government land. Buildings from the Exposition that still stand today (other than the Palace of Fine Arts) include what is now called the Bill Graham Civic Auditorium at Civic Center Plaza and the Japanese Tea house, which

6732-420: The state in celebration of California's produce. All the women were young, beautiful white women who were often the highlight of newspaper articles and events. This use of women presented the idea that they were useful only for their beauty but failed to appreciate their intellectual capacity and physical abilities. The International Conference of Women Workers to Promote Permanent Peace was held on July 4–7 in

6831-504: The steam exits the dry header of the superheater and passes down a steam pipe, entering the steam chests adjacent to the cylinders of a reciprocating engine. Inside each steam chest is a sliding valve that distributes the steam via ports that connect the steam chest to the ends of the cylinder space. The role of the valves is twofold: admission of each fresh dose of steam, and exhaust of the used steam once it has done its work. The cylinders are double-acting, with steam admitted to each side of

6930-412: The steam locomotive. Trevithick continued his own steam propulsion experiments through another trio of locomotives, concluding with the Catch Me Who Can in 1808, first in the world to haul fare-paying passengers. In 1812, Matthew Murray 's successful twin-cylinder rack locomotive Salamanca first ran on the edge-railed rack-and-pinion Middleton Railway . Another well-known early locomotive

7029-420: The structure, nicknamed the "Tin Barn", has served as the base fire department for the last 30 years. After its move, it initially served as a horse barn, and since then, it has served as a gym, PX and a movie theater for the base. The US Post Office issued a set of four postage stamps to commemorate the exposition, with designs depicting a profile of Vasco Núñez de Balboa (1¢), the Pedro Miguel Locks of

7128-544: The success of Rocket at the 1829 Rainhill Trials had proved that steam locomotives could perform such duties. Robert Stephenson and Company was the pre-eminent builder of steam locomotives in the first decades of steam for railways in the United Kingdom, the United States, and much of Europe. Towards the end of the steam era, a longstanding British emphasis on speed culminated in a record, still unbroken, of 126 miles per hour (203 kilometres per hour) by LNER Class A4 4468 Mallard , however there are long-standing claims that

7227-454: The time, there was an idea of a "New Woman" who was more progressive and advanced intellectually and sexually. This idea of a "New Woman" related to the overarching themes of the fair: modernity, and progress. In efforts to promote the fair, organizers used the "New Woman" as an advertising tactic and proof that San Francisco was an evolving and safe environment for tourists. During the fair, women could be seen posing with agriculture from around

7326-577: The title of the American Iris Society Alphabetical Iris Checklist . The first of these included some 12,000 names of species, cultivars, and their synonyms, while the 1939 book embraced 19,000 names. Ever since, the AIS has published a compilation of new registrations once a decade. In large part because of its sustained efforts at resolving nomenclature issues, the AIS became, in 1995, the official International Cultivar Registration Authority for all non-bulbous cultivars of

7425-434: The track, is of paramount importance. Because reciprocating power has to be directly applied to the rail from 0 rpm upwards, this creates the problem of adhesion of the driving wheels to the smooth rail surface. Adhesive weight is the portion of the locomotive's weight bearing on the driving wheels. This is made more effective if a pair of driving wheels is able to make the most of its axle load, i.e. its individual share of

7524-433: The two cylinders generates a full revolution of the driving wheel. Each piston is attached to the driving axle on each side by a connecting rod, and the driving wheels are connected together by coupling rods to transmit power from the main driver to the other wheels. Note that at the two " dead centres ", when the connecting rod is on the same axis as the crankpin on the driving wheel, the connecting rod applies no torque to

7623-419: The water level in a transparent tube, or sight glass. Efficient and safe operation of the boiler requires keeping the level in between lines marked on the sight glass. If the water level is too high, steam production falls, efficiency is lost and water is carried out with the steam into the cylinders, possibly causing mechanical damage. More seriously, if the water level gets too low, the crown sheet (top sheet) of

7722-401: The water-tube Brotan boiler . A boiler consists of a firebox where the fuel is burned, a barrel where water is turned into steam, and a smokebox which is kept at a slightly lower pressure than outside the firebox. Solid fuel, such as wood, coal or coke, is thrown into the firebox through a door by a fireman , onto a set of grates which hold the fuel in a bed as it burns. Ash falls through

7821-659: The west by the Palace of Fine Arts , which survives onsite. Further west into the Presidio, down The Avenue of the Nations, were national and states' buildings, displaying customs and products unique to the area represented. The far western end of the Fair, past the states' pavilions, was reserved for live stock exhibits. At the opposite end of the Fair, near Fort Mason was "The Zone", an avenue of popular amusements and concessions stands. Constructed from temporary materials (primarily staff ,

7920-408: The wheel. Therefore, if both cranksets could be at "dead centre" at the same time, and the wheels should happen to stop in this position, the locomotive could not start moving. Therefore, the crankpins are attached to the wheels at a 90° angle to each other, so only one side can be at dead centre at a time. Each piston transmits power through a crosshead , connecting rod ( Main rod in the US) and

8019-411: The wheels are coupled together, generally lack stability at speed. To counter this, locomotives often fit unpowered carrying wheels mounted on two-wheeled trucks or four-wheeled bogies centred by springs/inverted rockers/geared rollers that help to guide the locomotive through curves. These usually take on weight – of the cylinders at the front or the firebox at the rear – when the width exceeds that of

8118-406: The will to increase efficiency by that route. The steam generated in the boiler not only moves the locomotive, but is also used to operate other devices such as the whistle, the air compressor for the brakes, the pump for replenishing the water in the boiler and the passenger car heating system. The constant demand for steam requires a periodic replacement of water in the boiler. The water is kept in

8217-844: The world also runs in Austria: the GKB 671 built in 1860, has never been taken out of service, and is still used for special excursions. In 1838, the third steam locomotive to be built in Germany, the Saxonia , was manufactured by the Maschinenbaufirma Übigau near Dresden , built by Prof. Johann Andreas Schubert . The first independently designed locomotive in Germany was the Beuth , built by August Borsig in 1841. The first locomotive produced by Henschel-Werke in Kassel ,

8316-548: Was Puffing Billy , built 1813–14 by engineer William Hedley . It was intended to work on the Wylam Colliery near Newcastle upon Tyne. This locomotive is the oldest preserved, and is on static display at the Science Museum, London . George Stephenson , a former miner working as an engine-wright at Killingworth Colliery , developed up to sixteen Killingworth locomotives , including Blücher in 1814, another in 1815, and

8415-708: Was a three-quarter-scale version of the Palais de la Légion d'Honneur also known as the Hôtel de Salm in Paris by George Applegarth and H. Guillaume. At the close of the exposition, the French government granted Spreckels permission to construct a permanent replica of the French Pavilion, but World War I delayed the groundbreaking until 1921. The warehouse for the exposition was moved to Fort Hunter Liggett in South Monterey County and

8514-593: Was barged down the Bay to Belmont, California , and operated successively as a private residence, speakeasy, and restaurant. Also surviving are the one-third scale steam locomotives of the Overfair Railroad that operated at the Exposition. They had been maintained in working order at the Swanton Pacific Railroad Society located on Cal Poly San Luis Obispo's Swanton Ranch just north of Santa Cruz. But

8613-625: Was built in 1834 by Cherepanovs , however, it suffered from the lack of coal in the area and was replaced with horse traction after all the woods nearby had been cut down. The first Russian Tsarskoye Selo steam railway started in 1837 with locomotives purchased from Robert Stephenson and Company . In 1837, the first steam railway started in Austria on the Emperor Ferdinand Northern Railway between Vienna-Floridsdorf and Deutsch-Wagram . The oldest continually working steam engine in

8712-735: Was constructed for the Coalbrookdale ironworks in Shropshire in the United Kingdom though no record of it working there has survived. On 21 February 1804, the first recorded steam-hauled railway journey took place as another of Trevithick's locomotives hauled a train along the 4 ft 4 in ( 1,321 mm )-wide tramway from the Pen-y-darren ironworks, near Merthyr Tydfil , to Abercynon in South Wales. Accompanied by Andrew Vivian , it ran with mixed success. The design incorporated

8811-411: Was dictated by the maximum axle loading of the railroad in question. A builder would typically add axles until the maximum weight on any one axle was acceptable to the railroad's maximum axle loading. A locomotive with a wheel arrangement of two lead axles, two drive axles, and one trailing axle was a high-speed machine. Two lead axles were necessary to have good tracking at high speeds. Two drive axles had

8910-480: Was entered in and won the Rainhill Trials . This success led to the company emerging as the pre-eminent builder of steam locomotives used on railways in the UK, US and much of Europe. The Liverpool and Manchester Railway opened a year later making exclusive use of steam power for passenger and goods trains . Before the arrival of British imports, some domestic steam locomotive prototypes were built and tested in

9009-666: Was founded in January 1920, at a meeting hosted by the New York Botanical Garden (NYBG). Organizing efforts were led by horticulturist John Caspar Wister (first AIS president); James Boyd, president of the Pennsylvania Horticultural Society , who chaired the founding meeting; A. C. Beal, head of the NYBG's Department of Horticulture; iris breeder siblings Grace Sturtevant and Robert Sturtevant (first secretary of

9108-682: Was held at the Palace of Fine Arts to celebrate the 100th anniversary of the fair. A feature film, When the World Came to San Francisco , which tells the story of the fair, was made by writer and director R. Christian Anderson. It was part of the city's official centennial celebration sanctioned by the California Historical Society. The film had its world premiere at the de Young Fine Arts Museum in Golden Gate Park on October 30, 2015. Steam locomotive A steam locomotive

9207-679: Was named The Elephant , which on 5 May 1835 hauled a train on the first line in Belgium, linking Mechelen and Brussels. In Germany, the first working steam locomotive was a rack-and-pinion engine, similar to the Salamanca , designed by the British locomotive pioneer John Blenkinsop . Built in June 1816 by Johann Friedrich Krigar in the Royal Berlin Iron Foundry ( Königliche Eisengießerei zu Berlin),

9306-524: Was opened. The arid nature of south Australia posed distinctive challenges to their early steam locomotion network. The high concentration of magnesium chloride in the well water ( bore water ) used in locomotive boilers on the Trans-Australian Railway caused serious and expensive maintenance problems. At no point along its route does the line cross a permanent freshwater watercourse, so bore water had to be relied on. No inexpensive treatment for

9405-513: Was soon established. In 1830, the Baltimore and Ohio Railroad 's Tom Thumb , designed by Peter Cooper , was the first commercial US-built locomotive to run in America; it was intended as a demonstration of the potential of steam traction rather than as a revenue-earning locomotive. The DeWitt Clinton , built in 1831 for the Mohawk and Hudson Railroad , was a notable early locomotive. As of 2021 ,

9504-403: Was supplied at stopping places and locomotive depots from a dedicated water tower connected to water cranes or gantries. In the UK, the US and France, water troughs ( track pans in the US) were provided on some main lines to allow locomotives to replenish their water supply without stopping, from rainwater or snowmelt that filled the trough due to inclement weather. This was achieved by using

9603-483: Was the first commercially successful steam locomotive. Locomotion No. 1 , built by George Stephenson and his son Robert's company Robert Stephenson and Company , was the first steam locomotive to haul passengers on a public railway, the Stockton and Darlington Railway , in 1825. Rapid development ensued; in 1830 George Stephenson opened the first public inter-city railway, the Liverpool and Manchester Railway , after

9702-568: Was to celebrate the completion of the Panama Canal , but it was widely seen in the city as an opportunity to showcase its recovery from the 1906 earthquake . The fair was constructed on a 636-acre (257-hectare) site along the northern shore, between the Presidio and Fort Mason , now known as the Marina District . Among the exhibits at the exposition was the C. P. Huntington , the first steam locomotive purchased by Southern Pacific Railroad ;

9801-404: Was to use built-up bar frames, with the smokebox saddle/cylinder structure and drag beam integrated therein. In the 1920s, with the introduction of "superpower", the cast-steel locomotive bed became the norm, incorporating frames, spring hangers, motion brackets, smokebox saddle and cylinder blocks into a single complex, sturdy but heavy casting. A SNCF design study using welded tubular frames gave

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