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74-417: Henry David Thoreau is intimately associated with this area, which he called "Easterbrooks Country". In his Oct. 20, 1857 journal entry, one of several on the woodland, he writes: “What a wild and rich domain that Easterbrooks Country! Not a cultivated, hardly a cultivatable field in it, and yet it delights all natural persons.” During the early 20th century, a small number of Concord families began to acquire

148-586: A binder. The process of mixing graphite and clay, known as the Conté process, had been first patented by Nicolas-Jacques Conté in 1795. Thoreau made profitable use of a graphite source found in New Hampshire that had been purchased in 1821 by his uncle, Charles Dunbar. The company's other source of graphite had been Tantiusques , a mine operated by Native Americans in Sturbridge, Massachusetts . Later, Thoreau converted

222-532: A classic American work that explores natural simplicity, harmony, and beauty as models for just social and cultural conditions. The American poet Robert Frost wrote of Thoreau, "In one book ... he surpasses everything we have had in America." The American author John Updike said of the book, "A century and a half after its publication, Walden has become such a totem of the back-to-nature, preservationist, anti-business, civil-disobedience mindset, and Thoreau so vivid

296-458: A consequence of the percept constructed during this processing stage, as the elements first captured during low-level processing might easily be interpreted to form an image that differs from objective reality. An example is when two objects of the same size are placed on a certain background which conditions us to believe that one object might be larger than the other, and when the background is removed or replaced our perception immediately changes to

370-403: A dedicated neural path in the early stages of visual processing, and intense/repetitive activity or interaction with active adjoining channels (perceptual neural circuits, usually at the same level) causes a physiological imbalance that alters perception. During low-level visual processing, the retinal circuit arranges the information in the photoreceptors, by creating initial visual percepts from

444-470: A journal?' So I make my first entry to-day." Thoreau was a philosopher of nature and its relation to the human condition. In his early years he followed transcendentalism , a loose and eclectic idealist philosophy advocated by Emerson, Fuller, and Alcott. They held that an ideal spiritual state transcends, or goes beyond, the physical and empirical, and that one achieves that insight via personal intuition rather than religious doctrine. In their view, Nature

518-794: A late-night excursion to count the rings of tree stumps during a rainstorm, he became ill with bronchitis . His health declined, with brief periods of remission, and he eventually became bedridden. Recognizing the terminal nature of his disease, Thoreau spent his last years revising and editing his unpublished works, particularly The Maine Woods and Excursions , and petitioning publishers to print revised editions of A Week and Walden . He wrote letters and journal entries until he became too weak to continue. His friends were alarmed at his diminished appearance and were fascinated by his tranquil acceptance of death. When his aunt Louisa asked him in his last weeks if he had made his peace with God, Thoreau responded, "I did not know we had ever quarreled." Aware he

592-562: A leave of absence from Harvard, during which he taught at a school in Canton, Massachusetts , living for two years at an earlier version of today's Colonial Inn in Concord. His grandfather owned the earliest of the three buildings that were later combined. After he graduated in 1837, Thoreau joined the faculty of the Concord public school, but he resigned after a few weeks rather than administer corporal punishment . He and his brother John then opened

666-462: A mutual friend. Emerson, who was 14 years his senior, took a paternal and at times patron-like interest in Thoreau, advising the young man and introducing him to a circle of local writers and thinkers, including Ellery Channing , Margaret Fuller , Bronson Alcott , and Nathaniel Hawthorne and his son Julian Hawthorne , who was a boy at the time. Emerson urged Thoreau to contribute essays and poems to

740-614: A privately owned way with a public easement for travel. This landmark ruling affects the status of all such discontinued roads around the State. The Defendants filed a Notice of Appeal in December 2022. 42°29′44″N 71°21′14″W  /  42.4956°N 71.3538°W  / 42.4956; -71.3538 Henry David Thoreau This is an accepted version of this page Active Defunct Publications Works Henry David Thoreau (July 12, 1817 – May 6, 1862)

814-463: A product of this processing stage, and it is during this stage that we might ultimately become conscious of any optical illusion. There are two crucial properties of our visual system related mostly to high-level visual processing, referred to as selectivity and invariance (which we have consistently attempted to replicate in image recognition computer algorithms). Selectivity refers to the identification of particular features that are relevant to recognize

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888-590: A protester, so perfect a crank and hermit saint, that the book risks being as revered and unread as the Bible." Thoreau moved out of Emerson's house in July 1848 and stayed at a house on nearby Belknap Street. In 1850, he moved into a house at 255 Main Street , where he lived until his death. In the summer of 1850, Thoreau and Channing journeyed from Boston to Montreal and Quebec City . These would be Thoreau's only travels outside

962-543: A quarterly periodical, The Dial , and lobbied the editor, Margaret Fuller, to publish those writings. Thoreau's first essay published in The Dial was "Aulus Persius Flaccus", an essay on the Roman poet and satirist, in July 1840. It consisted of revised passages from his journal, which he had begun keeping at Emerson's suggestion. The first journal entry, on October 22, 1837, reads, " 'What are you doing now?' he asked. 'Do you keep

1036-547: A sign indicating that the trail was temporarily closed due to a series of Coyote attacks on dogs. The Town of Concord disputed the owners’ rights to close or regulate the trail and in November 2017 sued for access to the private road. Current and prior owners relied on a 1932 Order of Discontinuance, under an old law, which made them the owners of the road. In November 2022, the Land Court held that 1932 discontinuance established

1110-558: A similar refusal, were all pertinent, well considered, and reasoned. I took great pleasure in this deed of Thoreau's. Thoreau revised the lecture into an essay titled " Resistance to Civil Government " (also known as "Civil Disobedience"). It was published by Elizabeth Peabody in the Aesthetic Papers in May 1849. Thoreau had taken up a version of Percy Shelley 's principle in the political poem " The Mask of Anarchy " (1819), which begins with

1184-485: A specific element or object, while abstracting from other features that are not fundamental to performing the same recognition (e.g. when we see the shape of a house, certain contours that are essential for us to recognize it while other contours or image properties are not, such as color). On the other hand, invariance refers to the ability to be indifferent to small variations of a given feature, effectively identifying all those variations as simply being different versions of

1258-712: A two-year experiment in simple living , moving to a small house he had built on land owned by Emerson in a second growth forest around the shores of Walden Pond , having had a request to build a hut on Flints Pond , near that of his friend Charles Stearns Wheeler , denied by the landowners due to the Fairhaven Bay incident. The house was in "a pretty pasture and woodlot" of 14 acres (5.7 hectares) that Emerson had bought, 1 + 1 ⁄ 2 miles (2.5 kilometers) from his family home. Whilst there, he wrote his only extended piece of literary criticism, " Thomas Carlyle and His Works ". On July 24 or July 25, 1846, Thoreau ran into

1332-407: Is a distortion in the perception of time, which occurs when the time interval between two or more events is very narrow (typically less than a second). In such cases, a person may momentarily perceive time as slowing down, stopping, speeding up, or running backward. Illusions can occur with the other senses including those involved in food perception. Both sound and touch have been shown to modulate

1406-653: Is best which governs not at all;' and when men are prepared for it, that will be the kind of government which they will have.... But, to speak practically and as a citizen, unlike those who call themselves no-government men, I ask for, not at once no government, but at once a better government." Amos Bronson Alcott and Thoreau's aunt each wrote that "Thoreau" is pronounced like the word thorough ( / ˈ θ ʌr oʊ / THURR -oh —in General American , but more precisely / ˈ θ ɔːr oʊ / THOR -oh —in 19th-century New England). Edward Waldo Emerson wrote that

1480-402: Is linked to specific brain activity and so can be elicited by brain stimulation. The (illusory) percepts that can be evoked range from simple phosphenes (detections of lights in the visual field ) to high-level percepts. In a single-case study on a patient undergoing presurgical evaluation for epilepsy treatment, electrical stimulation at the left temporo-parietal junction evoked the percept of

1554-445: Is the only drink for a wise man; wine is not so noble a liquor. ... Of all ebriosity, who does not prefer to be intoxicated by the air he breathes?" Illusion An illusion is a distortion of the senses , which can reveal how the mind normally organizes and interprets sensory stimulation . Although illusions distort the human perception of reality , they are generally shared by most people. Illusions may occur with any of

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1628-530: Is the outward sign of inward spirit, expressing the "radical correspondence of visible things and human thoughts", as Emerson wrote in Nature (1836). On April 18, 1841, Thoreau moved in with the Emersons . There, from 1841 to 1844, he served as the children's tutor; he was also an editorial assistant, repairman and gardener. For a few months in 1843, he moved to the home of William Emerson on Staten Island , and tutored

1702-452: The Great Lakes region in 1861, when he visited Niagara Falls , Detroit, Chicago, Milwaukee , St. Paul and Mackinac Island . He was provincial in his own travels, but he read widely about travel in other lands. He devoured all the first-hand travel accounts available in his day, at a time when the last unmapped regions of the earth were being explored. He read Magellan and James Cook ;

1776-463: The arctic explorers John Franklin , Alexander Mackenzie and William Parry ; David Livingstone and Richard Francis Burton on Africa; Lewis and Clark ; and hundreds of lesser-known works by explorers and literate travelers. Astonishing amounts of reading fed his endless curiosity about the peoples, cultures, religions and natural history of the world and left its traces as commentaries in his voluminous journals. He processed everything he read, in

1850-406: The human body or conditions outside the body within one's physical environment. The term illusion refers to a specific form of sensory distortion. Unlike a hallucination , which is a distortion in the absence of a stimulus , an illusion describes a misinterpretation of a true sensation. For example, hearing voices regardless of the environment would be a hallucination, whereas hearing voices in

1924-597: The "Campaign for Estabrook Woods" which placed an additional 400 acres into conservation. The Woods are located just north of the historic North Bridge, site of the famous 1775 battle of the American Revolutionary War. Since the 1970s, the Woods have been used each April 19th as a route to reenact the march of the northern Minute Men to the North Bridge. However, the actual route was via Lowell Rd located just west of

1998-449: The Beagle . He kept detailed observations on Concord's nature lore, recording everything from how the fruit ripened over time to the fluctuating depths of Walden Pond and the days certain birds migrated. The point of this task was to "anticipate" the seasons of nature, in his word. He became a land surveyor and continued to write increasingly detailed observations on the natural history of

2072-509: The Concord Academy, a grammar school in Concord, in 1838. They introduced several progressive concepts, including nature walks and visits to local shops and businesses. The school closed when John became fatally ill from tetanus in 1842 after cutting himself while shaving. He died in Henry's arms. Upon graduation Thoreau returned home to Concord, where he met Ralph Waldo Emerson through

2146-876: The Individual in relation to Government", explaining his tax resistance at the Concord Lyceum . Bronson Alcott attended the lecture, writing in his journal on January 26: Heard Thoreau's lecture before the Lyceum on the relation of the individual to the State—an admirable statement of the rights of the individual to self-government, and an attentive audience. His allusions to the Mexican War, to Mr. Hoar 's expulsion from Carolina, his own imprisonment in Concord Jail for refusal to pay his tax, Mr. Hoar's payment of mine when taken to prison for

2220-810: The United States. It is as a result of this trip that he developed lectures that eventually became A Yankee in Canada . He jested that all he got from this adventure "was a cold". In fact, this proved an opportunity to contrast American civic spirit and democratic values with a colony apparently ruled by illegitimate religious and military power. Whereas his own country had had its revolution, in Canada history had failed to turn. In 1851, Thoreau became increasingly fascinated with natural history and narratives of travel and expedition. He read avidly on botany and often wrote observations on this topic into his journal. He admired William Bartram and Charles Darwin 's Voyage of

2294-458: The Woods. Estabrook Woods has significant ecological significance to the area. The Estabrook Woods are bordered by Lowell Road to the west, Monument Street to the east, and Bedford Road (Rt. 225) to the north. Most of Estabrook Woods is privately owned -- by Harvard University (672 acres), Middlesex School (180 acres), and a number of smaller landowners, who manage it cooperatively as a nature preserve. Trail and Parking maps are available for

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2368-688: The abolitionist movement began to accept Brown as a martyr, and by the time of the American Civil War entire armies of the North were literally singing Brown's praises . As a biographer of Brown put it, "If, as Alfred Kazin suggests, without John Brown there would have been no Civil War, we would add that without the Concord Transcendentalists, John Brown would have had little cultural impact." Thoreau contracted tuberculosis in 1835 and suffered from it sporadically afterwards. In 1860, following

2442-528: The advice of Emerson, using Emerson's publisher, Munroe, who did little to publicize the book. In August 1846, Thoreau briefly left Walden to make a trip to Mount Katahdin in Maine , a journey that was later recorded in "Ktaadn", the first part of The Maine Woods . Thoreau left Walden Pond on September 6, 1847. At Emerson's request, he immediately moved back to the Emerson house to help Emerson's wife, Lidian, manage

2516-535: The boat so perfectly, either with two paddles or with one, that it seemed instinct with his own will, and to require no physical effort to guide it." He was not a strict vegetarian, though he said he preferred that diet and advocated it as a means of self-improvement. He wrote in Walden , "The practical objection to animal food in my case was its uncleanness; and besides, when I had caught and cleaned and cooked and eaten my fish, they seemed not to have fed me essentially. It

2590-519: The college". He commented, "Let every sheep keep its own skin", a reference to the tradition of using sheepskin vellum for diplomas. Thoreau's birthplace still exists on Virginia Road in Concord. The house has been restored by the Thoreau Farm Trust, a nonprofit organization, and is now open to the public. The traditional professions open to college graduates—law, the church, business, medicine—did not interest Thoreau, so in 1835 he took

2664-423: The correct scenario (effectively concluding that both objects have equal dimensions). High-level visual processing consolidates information gathered from various sources to apply cognitive influences that create a conscious visual experience. Thus, allowing us to recognize the complex identity of different elements, and the disparate relations between them through cognitive processes. Visual illusions are also often

2738-447: The crossed index and middle fingers are run along the bridge of the nose with one finger on each side, resulting in the perception of two separate noses. The brain areas activated during illusory tactile perception are similar to those activated during actual tactile stimulation. Tactile illusions can also be elicited through haptic technology. These "illusory" tactile objects can be used to create "virtual objects". A temporal illusion

2812-416: The dispersal of seeds by winds or animals. In this lecture, first presented to a cattle show in Concord, and considered his greatest contribution to ecology, Thoreau explained why one species of tree can grow in a place where a different tree did previously. He observed that squirrels often carry nuts far from the tree from which they fell to create stashes. These seeds are likely to germinate and grow should

2886-437: The face of hostile elements, historical change, and natural decay; at the same time he advocated abandoning waste and illusion in order to discover life's true essential needs. Thoreau was a lifelong abolitionist , delivering lectures that attacked the fugitive slave law while praising the writings of Wendell Phillips and defending the abolitionist John Brown . Thoreau's philosophy of civil disobedience later influenced

2960-451: The family's sons while seeking contacts among literary men and journalists in the city who might help publish his writings, including his future literary representative Horace Greeley . Thoreau returned to Concord and worked in his family's pencil factory, which he would continue to do alongside his writing and other work for most of his adult life. He resurrected the process of making good pencils with inferior graphite by using clay as

3034-539: The first of three trips to northern Maine. His expectations were high because he hoped to find genuine, primeval America. But contact with real wilderness in Maine affected him far differently than had the idea of wilderness in Concord. Instead of coming out of the woods with a deepened appreciation of the wilds, Thoreau felt a greater respect for civilization and realized the necessity of balance." Of alcohol, Thoreau wrote, "I would fain keep sober always. ... I believe that water

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3108-933: The first recorded student protest in the American colonies. David Henry was named after his recently deceased paternal uncle, David Thoreau. He began to call himself Henry David after he finished college; he never petitioned to make a legal name change. He had two older siblings, Helen and John Jr., and a younger sister, Sophia Thoreau . None of the children married. Helen (1812–1849) died at age 37, from tuberculosis. John Jr. (1814–1842) died at age 27, of tetanus after cutting himself while shaving. Henry David (1817–1862) died at age 44, of tuberculosis. Sophia (1819–1876) survived him by 14 years, dying at age 56, of tuberculosis. He studied at Harvard College between 1833 and 1837. He lived in Hollis Hall and took courses in rhetoric , classics, philosophy, mathematics, and science. He

3182-561: The household while her husband was on an extended trip to Europe. Over several years, as he worked to pay off his debts, he continuously revised the manuscript of what he eventually published as Walden, or Life in the Woods in 1854, recounting the two years, two months, and two days he had spent at Walden Pond. The book compresses that time into a single calendar year, using the passage of the four seasons to symbolize human development. Part memoir and part spiritual quest, Walden at first won few admirers, but later critics have regarded it as

3256-681: The human senses, but visual illusions ( optical illusions ) are the best-known and understood. The emphasis on visual illusions occurs because vision often dominates the other senses. For example, individuals watching a ventriloquist will perceive the voice as coming from the dummy since they are able to see the dummy mouth the words. Some illusions are based on general assumptions the brain makes during perception . These assumptions are made using organizational principles (e.g., Gestalt theory), an individual's capacity for depth perception and motion perception , and perceptual constancy . Other illusions occur due to biological sensory structures within

3330-577: The land in Estabrook Woods. In 1932, they successfully petitioned the town to close and discontinue the old logging trail known as Old Estabrook Road, ensuring it would be protected from residential development.  Around 1965, these families, along with Harvard and Middlesex School, began working together to create a nature preserve, establishing Harvard's Concord Field Station and placing major restrictions on development of many remaining private lands.  In 1996, Concord and Carlisle worked together on

3404-539: The local tax collector , Sam Staples, who asked him to pay six years of delinquent poll taxes . Thoreau refused because of his opposition to the Mexican–American War and slavery , and he spent a night in jail because of this refusal. The next day Thoreau was freed when someone, likely to have been his aunt, paid the tax, against his wishes. The experience had a strong impact on Thoreau. In January and February 1848, he delivered lectures on "The Rights and Duties of

3478-539: The local laboratory of his Concord experience. Among his famous aphorisms is his advice to "live at home like a traveler". After John Brown's raid on Harpers Ferry , many prominent voices in the abolitionist movement distanced themselves from Brown or damned him with faint praise . Thoreau was disgusted by this, and he composed a key speech, " A Plea for Captain John Brown ", which was uncompromising in its defense of Brown and his actions. Thoreau's speech proved persuasive:

3552-424: The luxuries and many of the so-called comforts of life are not only not indispensable, but positive hindrances to the elevation of mankind. Thoreau was an early advocate of recreational hiking and canoeing , of conserving natural resources on private land, and of preserving wilderness as public land. He was himself a highly skilled canoeist; Nathaniel Hawthorne , after a ride with him, noted that "Mr. Thoreau managed

3626-410: The methods and findings of ecology and environmental history , two sources of modern-day environmentalism. His literary style interweaves close observation of nature, personal experience, pointed rhetoric, symbolic meanings, and historical lore, while displaying a poetic sensibility, philosophical austerity , and attention to practical detail. He was also deeply interested in the idea of survival in

3700-539: The most varied and unusual instructive sayings. Henry David Thoreau was born David Henry Thoreau in Concord, Massachusetts , into the "modest New England family" of John Thoreau, a pencil maker, and Cynthia Dunbar. His father was of French Protestant descent. His paternal grandfather had been born on the UK crown dependency island of Jersey . His maternal grandfather, Asa Dunbar, led Harvard's 1766 student " Butter Rebellion ",

3774-496: The name should be pronounced "Thó-row", with the h sounded and stress on the first syllable. Among modern-day American English speakers, it is perhaps more commonly pronounced / θ ə ˈ r oʊ / thə- ROH —with stress on the second syllable. Thoreau had a distinctive appearance, with a nose that he called his "most prominent feature". Of his appearance and disposition, Ellery Channing wrote: His face, once seen, could not be forgotten. The features were quite marked:

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3848-486: The nose aquiline or very Roman, like one of the portraits of Caesar (more like a beak, as was said); large overhanging brows above the deepest set blue eyes that could be seen, in certain lights, and in others gray,—eyes expressive of all shades of feeling, but never weak or near-sighted; the forehead not unusually broad or high, full of concentrated energy and purpose; the mouth with prominent lips, pursed up with meaning and thought when silent, and giving out when open with

3922-514: The patterns of light which fall on the retina. The Hermann grid illusion and Mach bands are two illusions that are widely considered to be caused by a biological phenomenon named lateral inhibition , where the receptor signal in the retina's receptive fields from light and dark areas compete with one another. The assembly of visual elements into a collective percept, that distinguishes objects from backgrounds, takes part during intermediate-level visual processing. Many common visual illusions are

3996-552: The pencil factory to produce plumbago, a name for graphite at the time, which was used in the electrotyping process. Once back in Concord, Thoreau went through a restless period. In April 1844 he and his friend Edward Hoar accidentally set a fire that consumed 300 acres (120 hectares) of Walden Woods. I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived. I did not wish to live what

4070-437: The perceived staleness and crispness of food products. It was also discovered that even if some portion of the taste receptor on the tongue became damaged that illusory taste could be produced by tactile stimulation. Evidence of olfactory (smell) illusions occurred when positive or negative verbal labels were given prior to olfactory stimulation. The McGurk effect shows that what we hear is influenced by what we see as we hear

4144-406: The person speaking; the auditory component of one sound is paired with the visual component of another sound, leading to the perception of a third sound. Some illusions occur as a result of an illness or a disorder. While these types of illusions are not shared with everyone, they are typical of each condition. For example, people with migraines often report fortification illusions . Perception

4218-627: The political thoughts and actions of notable figures such as Leo Tolstoy , Mahatma Gandhi , and Martin Luther King Jr. Thoreau is sometimes referred to retrospectively as an anarchist , but may perhaps be more properly regarded as a proto-anarchist . In his seminal essay, "Civil Disobedience", Thoreau wrote as follows: "I heartily accept the motto,— 'That government is best which governs least;' and I should like to see it acted up to more rapidly and systematically. Carried out, it finally amounts to this, which also I believe,— 'That government

4292-530: The portions owned by the Town of Concord (115 acres), and the Town of Carlisle (188 acres). Approximately half the Woods has trails open to the public, mostly by permission of the owners, subject to posted rules. Estabrook Trail traverses private property in Estabrook Woods, connecting Estabrook Road in Concord to Estabrook Road in Carlisle. In April of 2017, the owners of the southern half mile of Estabrook Trail posted

4366-533: The powerful images of the unjust forms of authority of his time and then imagines the stirrings of a radically new form of social action. At Walden Pond, Thoreau completed a first draft of A Week on the Concord and Merrimack Rivers , an elegy to his brother John, describing their trip to the White Mountains in 1839. Thoreau did not find a publisher for the book and instead printed 1,000 copies at his own expense; fewer than 300 were sold. He self-published on

4440-407: The rise of environmental history and ecocriticism as academic disciplines, several new readings of Thoreau began to emerge, showing him to have been both a philosopher and an analyst of ecological patterns in fields and woodlots. For instance, "The Succession of Forest Trees", shows that he used experimentation and analysis to explain how forests regenerate after fire or human destruction, through

4514-434: The same feature (e.g. we can recognize a given handwritten letter of the alphabet, written by different people with distinct styles of calligraphy). The whole process that constructs our visual experience is extremely complex (with multiple qualities that are unmatched by any computer or digital system). It is organized by many sequential and parallel sub-processes, each of which is essential in building our conscious image of

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4588-426: The sound of running water (or another auditory source) would be an illusion. So, it should not be wrong to consider that illusions are just "misinterpretations" on how our brain perceives something that exists (unlike a hallucination where a stimulus is absent). A visual illusion or optical illusion is characterized by visually perceived images that are deceptive or misleading. Therefore, the information gathered by

4662-689: The spreading mass of humanity in North America. He decried the latter endlessly but felt that a teacher needs to be close to those who needed to hear what he wanted to tell them. The wildness he enjoyed was the nearby swamp or forest, and he preferred "partially cultivated country". His idea of being "far in the recesses of the wilderness" of Maine was to "travel the logger's path and the Indian trail", but he also hiked on pristine land. In an essay titled, "Henry David Thoreau, Philosopher", environmental historian Roderick Nash wrote, "Thoreau left Concord in 1846 for

4736-505: The squirrel die or abandon the stash. He credited the squirrel for performing a "great service ... in the economy of the universe." He traveled to Canada East once, Cape Cod four times, and Maine three times; these landscapes inspired his "excursion" books, A Yankee in Canada , Cape Cod , and The Maine Woods , in which travel itineraries frame his thoughts about geography, history and philosophy. Other travels took him southwest to Philadelphia and New York City in 1854 and west across

4810-417: The stimulus, or "impossible" sounds. In short, audio illusions highlight areas where the human ear and brain, as organic, makeshift tools, differ from perfect audio receptors (for better or for worse). One example of an auditory illusion is a Shepard tone . Examples of tactile illusions include phantom limb , the thermal grill illusion , the cutaneous rabbit illusion and a curious illusion that occurs when

4884-402: The town, covering an area of 26 square miles (67 square kilometers), in his journal, a two-million-word document he kept for 24 years. He also kept a series of notebooks, and these observations became the source of his late writings on natural history, such as "Autumnal Tints", "The Succession of Trees", and "Wild Apples", an essay lamenting the destruction of the local wild apple species. With

4958-455: The visual sense is processed to create a percept that does not tally with information from other senses or physical measurements. The visual system, which includes the eyes (namely the retinas) and the central nervous system (namely the brain's visual cortex), constructs reality through both perceptual and cognitive neural pathways. Visual illusions are (at least in part) thought to be caused by excessive competing stimuli. Each stimulus follows

5032-442: The world. Our whole visual system seeks to simplify and categorize the unstructured low-level visual information, through both selectivity and invariance. Thus, while trying to organize an image by "filling in the gaps" through assumptions, we become vulnerable to misinterpretation. An auditory illusion is an illusion of hearing , the auditory equivalent of a visual illusion: the listener hears either sounds which are not present in

5106-432: The world; or if it were sublime, to know it by experience, and be able to give a true account of it in my next excursion. Thoreau felt a need to concentrate and work more on his writing. In 1845, Ellery Channing told Thoreau, "Go out upon that, build yourself a hut, & there begin the grand process of devouring yourself alive. I see no other alternative, no other hope for you." Thus, on July 4, 1845, Thoreau embarked on

5180-563: Was a member of the Institute of 1770 (now the Hasty Pudding Club ). According to legend, Thoreau refused to pay the five-dollar fee (approximately equivalent to $ 153 in 2023) for a Harvard master's diploma, which he described thus: Harvard College offered it to graduates "who proved their physical worth by being alive three years after graduating, and their saving, earning, or inheriting quality or condition by having Five Dollars to give

5254-561: Was an American naturalist, essayist, poet, and philosopher. A leading transcendentalist , he is best known for his book Walden , a reflection upon simple living in natural surroundings, and his essay " Civil Disobedience " (originally published as "Resistance to Civil Government"), an argument in favor of citizen disobedience against an unjust state. Thoreau's books, articles, essays, journals, and poetry amount to more than 20 volumes. Among his lasting contributions are his writings on natural history and philosophy, in which he anticipated

5328-552: Was dying, Thoreau's last words were "Now comes good sailing", followed by two lone words, "moose" and "Indian". He died on May 6, 1862, at age 44. Amos Bronson Alcott planned the service and read selections from Thoreau's works, and Channing presented a hymn. Emerson wrote the eulogy spoken at the funeral. Thoreau was buried in the Dunbar family plot; his remains and those of members of his immediate family were eventually moved to Sleepy Hollow Cemetery in Concord, Massachusetts. Most of

5402-421: Was insignificant and unnecessary, and cost more than it came to. A little bread or a few potatoes would have done as well, with less trouble and filth." Thoreau neither rejected civilization nor fully embraced wilderness. Instead he sought a middle ground, the pastoral realm that integrates nature and culture. His philosophy required that he be a didactic arbitrator between the wilderness he based so much on and

5476-454: Was not life, living is so dear; nor did I wish to practise resignation, unless it was quite necessary. I wanted to live deep and suck out all the marrow of life, to live so sturdily and Spartan-like as to put to rout all that was not life, to cut a broad swath and shave close, to drive life into a corner, and reduce it to its lowest terms, and, if it proved to be mean, why then to get the whole and genuine meanness of it, and publish its meanness to

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