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Harper's Encyclopedia of United States History (ed. Benson Lossing) 172 172 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 34 34 Browse Search
Benjamin Cutter, William R. Cutter, History of the town of Arlington, Massachusetts, ormerly the second precinct in Cambridge, or District of Menotomy, afterward the town of West Cambridge. 1635-1879 with a genealogical register of the inhabitants of the precinct. 34 34 Browse Search
Jefferson Davis, The Rise and Fall of the Confederate Government 26 26 Browse Search
Rebellion Record: a Diary of American Events: Documents and Narratives, Volume 1. (ed. Frank Moore) 19 19 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 18 18 Browse Search
Horace Greeley, The American Conflict: A History of the Great Rebellion in the United States of America, 1860-65: its Causes, Incidents, and Results: Intended to exhibit especially its moral and political phases with the drift and progress of American opinion respecting human slavery from 1776 to the close of the War for the Union. Volume I. 18 18 Browse Search
Edward L. Pierce, Memoir and letters of Charles Sumner: volume 1 16 16 Browse Search
Wendell Phillips, Theodore C. Pease, Speeches, Lectures and Letters of Wendell Phillips: Volume 1 15 15 Browse Search
Cambridge History of American Literature: volume 1, Colonial and Revolutionary Literature: Early National Literature: Part I (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 13 13 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1787 AD or search for 1787 AD in all documents.

Your search returned 18 results in 10 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
nd together. Chain-pumps. The axis of one wheel is supported on the curb, and the other on a post in the bottom of the well, or on a scantling lowered from above. The chain-pump b was first used in the British navy on board the Flora, in 1787. As now used in the English navy, it is formed of a long chain which carries disks at intervals, and passes over sprocket-wheels above and below; the chain passes down a tube called the back-casing, dips into the limber where the bilge-water coll Charles Marshall, in 1753, proposed insulated wires, suspended by poles, as electrical conductors for transmitting messages. Lesarge, in 1774, used twenty-four electrized wires and a pith-ball electrometer as a mode of signaling. Lomond, in 1787, used one wire and a pith-ball. Reizen, in 1794, had twenty-six line wires and letters in tin-foil which were rendered visible by electricity. Cavallo, in 1795, had one wire, and talked by sparks. He had an explosion of gas for an alarm.
Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
tantaneous throughout its length. He signaled an observer by this means. A writer in the Scots' magazine, in 1753, proposed a series of wires from the ends of which were to be suspended light balls marked with the letters of the alphabet, or bells which were to be moved by an electric current directed to the appropriate wire. Lesage, at Geneva, in 1774, actually constructed a telegraph arranged in this manner, the end of each wire having a pith-ball electroscope attached. Lamond, in 1787, employed a single wire, employing an electrical machine and electroscope in each of two rooms, and thus talking with Madame Lamond by the peculiar movements of the pith-balls according to an agreed code; and Reusser, in 1794, proposed the employment of letters formed by spaces cut out of parallel strips of tin-foil pasted on sheets of glass, which would appear luminous on the passage of the electric spark. In 1795, Cavallo proposed to transmit letters and numbers by a combination of spark
Knight's Mechanical Encyclopedia (ed. Knight), H. (search)
ne, which must not be confounded with the doublecylinder engine of Hornblower of Penryhn, patented in 1781, revived by Woolf, and much improved by Worthington. See plate opposite page 763. Oliver Evans of Philadelphia has hardly had sufficient credit for his part in the matter, but he struggled for many years to make his townsmen believe that the high-pressure, double-acting engine was to be the engine of the future, both on roads and boats. He was active in the running of his hobby from 1787 to 1803, and in the former year obtained a patent from the State of Maryland for steam-carriages on common roads. His townsmen thought him crazy, and he could obtain no patent in Pennsylvania. He exhibited his engine running in 1803, sawing wood and stone, and grinding plaster. He put it on wheels and made it move itself to the Schuylkill, put it on board a scow, and made it drive a sternwheel, working down the river to the junction with the Delaware, and then up the latter to the city of
Knight's Mechanical Encyclopedia (ed. Knight), I. (search)
mpressions from the copperplate on a flexible strap covered with a strong gelatinous mixture of glue and treacle. This strap is then pressed on the ware, and gives the impression in glue; the coloring powder is then dusted over it, and a sufficient portion adheres to the damp parts to give the pattern, after having been again in the kiln. The more elaborate patterns on earthenware, and all those on porcelain, are finished by penciling in. Iron Ves′sel. The first iron boat was built in 1787, by J. Wilkinson, of Bradley Forge, England. It was 70 feet long, 6 feet 8 1/2 inches beam. The plates were 5/16 inch, secured by rivets. The stem and stern-post were of wood, the beams of elm planks. Her weight was 8 tons, capacity 32 tons; she drew 8 to 9 inches of water when light, and plied on the Birmingham Canal. An iron pleasure-boat was launched on the Mersey in 1815 by T. Jevous of Liverpool. It was scuttled by jealous shipbuilders, and an iron life-boat launched by the same
Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
ho raised a cry of distress, thinking he had met the Evil One. This locomotive was exhibited before the Institution of Mechanical Engineers in 1850, 66 years after its construction. Oliver Evans of Philadelphia obtained a patent in Maryland in 1787 for the exclusive right to make steam-wagons for roads and railways. The details of the invention are not known to the writer. His descendants in the third generation are yet inventing. He is entitled to the credit of first making the double-acof two men to work it. He secured his patent April 4, 1785. He then went for the first time to see how other people wove, and was astonished at the comparative clumsiness of his own contrivance. He went on improving, and took out his last patent 1787. He met with the trouble incident to great inventors, — an ignorant populace and rich pirates. He spent £ 30,000 in his endeavors to perfect his loom, and in 1808 received a Parliamentary grant of £ 10,000 for his great national services. On th
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
11, and in 1819 published his celebrated work Upon the magnetism of the earth. He treated the matter historically and scientifically, making a variation chart for 1787. The agonic line, or line of no variation, where the magnetic and geographical lines coincide, was discovered by Columbus in 1492, about 100 miles west of the A its effects from pole to pole; and that its motion is not sudden, but gradual and regular. The western line of no variation in Hansteen's chart, calculated for 1787, begins in latitude 60° to the west of Hudson's Bay, proceeds southeast through the North American lakes, passes the Antilles and Cape St. Roque till it reaches the South Atlantic Ocean, where it cuts the meridian of Greenwich in about 65° south latitude. The eastern line of no variation (1787) is extremely irregular, heaving curious curves and contortions, indicating the action of local magnetic forces. It begins in latitude 60° south, below Australia; crosses that island, extends thro
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
, is, or should be, a circular view. The invention of the panorama is due to Barker, a portrait-painter of Edinburgh, who obtained a patent for his invention in 1787. His panorama of Edinburgh was painted in 1789. In 1792 he exhibited his panorama of London. Fulton introduced the art into France, 1799. In 1821, during the aes; a a are radius rods connected at one end with the framing and at the other with a vibrating piece at top of the piston-rod. M, invented by Dr. Cartwright in 1787: the wheels a a have equal diameters and numbers of teeth; the cranks b b are of equal radius and are set in opposite directions, keeping the connecting rods c c a of an Indian canoe. In 1786, Benjamin Franklin and Oliver Evans advocated the hydraulic propeller, receiving the water forward and forcing it out astern. In 1787, Patrick Miller patented, in England, paddle-wheels for propulsion. In 1788, Fitch ran his boat by means of reciprocating paddles. In 1788, Symington had a s
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
is oblique with the face of the abutment, instead of being at right angles thereto. As originally built, the voussoirs were laid parallel to the abutments. In 1787, Chapman, in constructing a bridge over the Kildare Canal, was led to the invention of the correct principle, making the joints of the voussoirs rectangular with t89 a boat 60 feet long was propelled on the Forth and Clyde Canal at the rate of 7 miles an hour. Patrick Miller published an account of the invention in the year 1787. Miller's boat, Dalswinton, Scotland (from his plan in 1787). Symington's steam-vessel, constructed in 1789, had a central space running lengthwise between t1787). Symington's steam-vessel, constructed in 1789, had a central space running lengthwise between the two boats, which were placed side by side and decked over. Each boat was 25 feet long and 7 feet beam, and the engine was placed on a platform. The engine had 4 inch cylinders, and drove a couple of paddlewheels, fore and aft of the engine which was placed amidships The engines were atmospheric, and their pistons were connect
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
es Coast Survey, while in France the repeating circle of Borda has been preferred. The telescope has a motion on a horizontal axis, and has a vertical graduated circle, which has also a horizontal. See under telescope for notice of the first use of telescopes in triangulation or measuring angles. The first survey made by an instrument with a perfect circle is said to be that of Zealand, by Bugge, in 1762-68. Ramsden's theodolite had a circle 3 feet in diameter, and was completed in 1787. It had two telescopes of 36 inches focal length. It was used for a triangulation to connect the observatories of Greenwich and Paris, and also in the English, Irish, and Indian trigonometric surveys. The telescope circle and stand are capable of motion round a vertical axis. The altazimuth may be considered a modification of the transit instrument, and has been called a transit theodolite, being adapted for meridional or extra-meridional observations indifferently. Everest's theodolit
Knight's Mechanical Encyclopedia (ed. Knight), U. (search)
ge to show the incorrectness of the then received opinion that magnetism is an effluvium issuing forth from the root of the tail of the Little Bear. Halley, in 1683, sketched his theory of four magnetic poles or points of attraction, and of the periodical movement of the magnetic lines of no variation. In 1698-1702 he made several voyages of observation, and the result was a general variationchart, in which the points of equal variation were connected by curved lines. Hansteen's chart (1787) gives the western and eastern lines of no variation at the date of his writing. These are given under magnetometer (which see). Variation-charts are now in common use at sea. An excellent one, derived from the most recent observations, is published from time to time by the British Admiralty. Before chronometers had attained their present excellence, and lunar observations were commonly practiced, it was proposed to determine the longitude at sea from the variation of the compass; b