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George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 6, 10th edition. 73 73 Browse Search
Harper's Encyclopedia of United States History (ed. Benson Lossing) 69 69 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 56 56 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
Knight's Mechanical Encyclopedia (ed. Knight) 21 21 Browse Search
HISTORY OF THE TOWN OF MEDFORD, Middlesex County, Massachusetts, FROM ITS FIRST SETTLEMENT, IN 1630, TO THE PRESENT TIME, 1855. (ed. Charles Brooks) 14 14 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.) 10 10 Browse Search
Thomas Wentworth Higginson, Henry Walcott Boynton, Reader's History of American Literature 5 5 Browse Search
Cambridge History of American Literature: volume 3 (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 4 4 Browse Search
Francis Jackson Garrison, William Lloyd Garrison, 1805-1879; the story of his life told by his children: volume 2 3 3 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1767 AD or search for 1767 AD in all documents.

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d that the real ingredient to which it owed these qualities was common air. Two memoirs of his experiments were read before the Royal Academy of Sciences in 1750. Dr. Priestley greatly improved upon the discoveries made by Venel and others, and in 1767 contrived an easy method of impregnating water with the principle then denominated fixed air, by placing shallow pans of water near the surface of the fermenting vessels of a brewery, which in a few hours became pleasantly impregnated with the escwith the fireplace, and as the contents of the latter burned away, the fuel from the tower subsided into the fireplace and kept up the fire. The subject has been amplified of late years. Watt introduced it into his steam — boiler furnace about 1767. Many stoves are now constructed on that principle in England and in the United States. At what time the venerable alchemists first contrived the athanor we do not know. We presume that Hermes Trismegistus, Aristotle, and their colaborers of
netting of small rope or cord, from which is suspended a car or basket. The balloon is provided with a valve, controlled by a rope within reach of a person in the car, to allow the gas by which the balloon is inflated to escape when it is desired to descend. Galion, of Avignon, wrote on aerostation in 1575; but the discovery of hydrogen made by Cavendish, in England, seemed to offer a feasible mode of accomplishing the object, and its use was suggested for that purpose by Dr. Black, in 1767, who ascertained that a light envelope filled with this gas would ascend. Balloon. The first machine by which an ascent was made into the upper regions of the atmosphere was invented and constructed by the brothers Stephen and Joseph Montgolfier, paper-manufacturers at Annotay, near Lyons, France. After experimenting unsuccessfully with hydrogen-gas, they tried heating the air contained in the balloon by means of a fire in its open mouth, and in June, 1783, a captive balloon was by th
s of railway cars. They were originally like those in ordinary use, and were guided by flanges on the rails, as in the case of the Sheffield Colliery Railroad, 1767. At this time the rails were of cast-iron. In 1789, car-wheels were made with flanges, to run on the edge-rail, which was first made of castiron and used at Lo, 1738. Carding-machine, Lewis Paul, 1738. Drop-box, Robert Kay, 1760. Spinning by rollers, Lewis Paul or John Wyatt, 1738. Spinning-jenny, Hargreaves, 1767. Water-frame, Arkwright, 1769. Power-loom, Rev. D. E. Cartwright, 1785. Cotton-gin, Eli Whitney, 1794. Dressing-machine, Johnson and Radcliffe, 1802– 1ng sixteen force-pumps. In the third arch were three wheels, working fifty-two pumps. The united effect was 2,052 gallons per minute, raised 120 feet high. In 1767 Smeaton added wheels in the fifth arch. Steam-engines were added about this time to assist at low water and at neap-tides. Thus the matter remained till 1821.
been folded. Flat-press. A press used in the india-rubber business for flattening together a number of piles of folded cloth while they are vulcanized and blended together by a steam heat of say 280° F. Flat-rail. A railroad rail consisting of a simple flat bar, spiked to a longitudinal sleeper. Tramways of wood were laid down by Beaumont at Newcastle, in 1602. They were protected by flat straps of iron in 1738, at Whitehaven. Flat cast-iron plates were laid at Coalbrookdale in 1767. The angular cast-iron rail was used in 1776. Edge rails of cast-iron in 1789. Rolled rails in 1820. See rail. Flat-rope. A rope made by plaiting yarns together instead of twisting. Gasket; sennit. Some flat ropes, for mining-shafts, are made by sewing together a number of ropes, making a wide, flat band. Flat-rope Pul′ley. A pulley having a true cylindrical surface and two rising flanges, to keep the band from running off. See pulley. Flat′ten-ing-fur′nace. A furn
lphabet were engraved on four parallel revolving rings, which by prearrangement on the part of the owner were made to spell a certain word, or number of words, before the lock could be opened. A French treatise, L'Art de Serrurier, published in 1767, contains many examples of the locks of that and former periods. It appears that, though the art had advanced as far as the invention of the single tumbler, yet the main dependence was placed on the complexity of the wards. Multiple bolts, shot f a set of locks. Such keys are adapted to locks having wards of the same general form. The period of the invention of tumbler-locks (E) is unknown. Some elaborate examples are exhibited in the French treatise before referred to, published in 1767. Locks. The tumbler is a lever or latch which falls into a notch of the bolt, and prevents it from being shot until the tumbler has been raised or released by the action of the key. A simple form is shown at E. The bolt has two square notche
ring s. The damper existed previously in the clavichord, but was not movable vertically so as to leave the string when the hammer struck. The piano-forte, as such, was introduced to the English public on the stage of Covent Garden Theater in 1767. On a playbill of that date occurs the following: — For the Benefit of Miss Brickler, 16th of May, 1767. At the end of the first act Miss Brickler will sing a favorite song from Judith, accompanied by Mr. Dibdin on a new instrument called the Port′a-ble stove. A stove for army, emigrant, or mechanical uses, which require its removal and transportation. Such are used by plumbers, and by those who follow the business of roofing with paper and bituminous compounds, tar, etc. See page 1767. The stoves are of sheet-iron, and adapted to heat kettles, caldrons, or ovens, as the ease may be. Por′tal. (Architecture.) The arch over a door or gateway; an entrance under cover. Port-cul′lis. (Fortification.) A frame o
rdinary road. The rollers of the carts were made to fit the rails. (North, 1676.) After a while the rails were laid on cross-ties and pinned thereto. In 1716 flat plates of malleable iron were nailed to the wooden rails. (a, flat rail.) In 1767 the Coalbrookdale works laid down flat cast-iron rails. In 1776 cast-iron rails, with an upright flange, were laid on wooden sleepers and used at the Duke of Norfolk's colliery, near Sheffield. (Carr's patent, b.) They were spiked down. The fe laid upon transverse timbers or sleepers, and secured with pegs of wood, the sleepers being imbedded in the material of the roadway. About 1716, the wooden ways were capped by thin plates of malleable iron. Cast-iron bars were substituted in 1767. In 1776, Carr took out a patent for cast-iron rails of L-shape to retain the wheels on the rails without flanges on the wheels. In 1800, stone props instead of timber for supporting the junctions of the rails were invented in Derbyshire by Mr.
ne erected in 153 by a Dutchman was abandoned on account of the opposition of the populace; and more than a century later (1767), when James Stansfield established a wind saw-mill at Limehouse. East London, it was destroyed by a mob. A similar mill nto an elongated thread. The machine was introduced soon after the invention by Hargreaves of the spinning-jenny, about 1767. The jenny was the original of the slubbing-billy and the mule; the traveling carriage carrying spindles, the interruptedhe can, the sliver being wound on a bobbin therein. See jack-frame. Spin′ning-jen′ny. James Hargreaves' invention, 1767. Up to the time of the invention of the jenny, all the yarn and thread of the cotton, flax, and woolen manufactures werethey united the cities with the suburbs. Wooden rails with malleable iron caps were used in 1716. Cast-iron rails in 1767. L-shaped rails in 1776. Rolled rails in 1820. See rail, pages 1857, 1858. The railways originated in the collie
eneath the shoe to protect the foot and the shoe from injury when digging. 2. A tool for trimming hedges. Tram-plate. The first form of iron railway-rail. Trammel multiple-gearing. It was patented by Carr of Sheffield, 1776. Previous to this time, the wooden trams had been protected by malleable iron plates, a practice introduced at Newcastle about 1602. The Coalbrookdale Iron Company substituted cast-iron plates 5 feet long, 4 inches broad, and 1 1/4 inch thick; this was in 1767. Carr was the first to make the iron rail. Jessop made edgerails of cast-iron in 1789. Birkenshaw introduced the rolled rail in 1820. Tram-plates. Tram′pot. (Milling.) The support in which the foot of the spindle is stepped. The arched trampot a is used for straddling the driving-shaft where bevelgear is employed. The more common form b has a movable center adjustable by means of four set-screws. Trampot. Tram-road. A road in which the track for the wheels is made
ed by any appliances of the new science. It was invented by Volta in 1800. Voltaic pile. Zamboni's pile consists of alternate disks of gilded paper and sheet-zinc packed in a glass tube and pressed at each end by metallic plates, which are respectively positive and negative. The disks being dry, the effect is feeble. Two of these piles have been made to oscillate continually a pendulous clapper, which, striking against two bells on the piles, simulated perpetual motion. Sulzer, in 1767, had noticed that when two pieces of different metals, as copper and zinc, were placed one above and the other below the tongue, an itching sensation, accompanied by a metallic taste similar to that of copperas, was produced. Vol-tam′e-ter. An instrument for measuring the strength of a voltaic current. In Faraday's (A, Fig. 6991), two tubes with closed ends, and containing water acidulated with sulphuric acid, are inverted in a vessel containing the same fluid In each tube is a slip
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