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Document Max. Freq Min. Freq
Harper's Encyclopedia of United States History (ed. Benson Lossing) 55 55 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 35 35 Browse Search
George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 4, 15th edition. 16 16 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. 8 8 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 7 7 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) 6 6 Browse Search
Medford Historical Society Papers, Volume 8. 6 6 Browse Search
Charles A. Nelson , A. M., Waltham, past, present and its industries, with an historical sketch of Watertown from its settlement in 1630 to the incorporation of Waltham, January 15, 1739. 5 5 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.) 3 3 Browse Search
the Rev. W. Turner , Jun. , MA., Lives of the eminent Unitarians 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 1753 AD or search for 1753 AD in all documents.

Your search returned 7 results in 5 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
gh a tube embraced by the lips of the diver, who, by the expansion of his chest at each inspiration, forced out of the helmet into another tube leading to the surface a quantity of previously exhaled air precisely equal to the fresh air taken into the lungs. In some of the older forms the helmet itself was made large enough to hold a quantity of air sufficient to supply the diver for a considerable length of time, differing little, in fact, from the diving-bell. The apparatus of Mr. Rowe, 1753, consisted essentially of a copper tube large enough to contain the body of the diver and a limited supply of air which could be renewed from time to time by a bellows or force-pump, and having windows and water-tight holes for the arms. These cases have, however, been completely superseded by the divingbell, and it by the more modern forms of armor, some of which will be mentioned. See diving. Dixing apparatus. Fig. 359 shows a figure in a diving-dress, attached to which is a reservo
Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
r was the Leyden jar, the invention of Muschenbroek and Kleist, three years previous. Franklin flew his kite in Philadelphia in 1752, and proved the substantial identity of lightning and frictional electricity. He then invented the lightning-rod for the harmless passage of the electricity. D'Alibard erected a lightning-rod in the same year. Richmann of St. Petersburg, the following year, in repeating Franklin's experiment, was killed by a stroke of lightning. 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. 2. (Surgical.) A groove
Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
pose of verifying Franklin's theory, which was found to give sparks on the passage of a thunder-cloud. Similar experiments were repeated throughout Europe, and in 1753 Richman was instantly killed at St. Petersburg by a discharge from a rod of this kind. The more important discoveries since those days relate rather to electriceet of wire, and proved that it was practically instantaneous 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 e as they were used. A coating of melted wax was then evenly spread over all, and, when it was quite cold, was polished. The art was revived by Count Caylus in 1753. The wood or canvas is coated with wax, which is warmed at the fire. The colors are mixed with white wax and powdered mastic, which are rubbed smooth with gum-wa
Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
fferent rays. The achromatic lens k is a combination of a double convex lens of crown-glass and a plano-concave or a concavo-convex lens of flint-glass. The advantages of a lens formed in this manner are freedom from spherical aberration or distortion, and the rays of light are not decomposed into the primary colors; in other words, the light passes through the lens and suffers no change thereby. They were formerly combinations of three lenses, as shown at l. They were made by Dollond in 1753. See achromatic lens. The Coddington lens is of spherical form, and has a deep equatorial groove around it filled with opaque matter, acting as a diaphragm to diminish the quantity of light and exclude lateral rays. A spherical silica lens is ascribed to an experiment of Sir Humphry Davy. One end of a wheat straw is ignited, and the spear is allowed to consume grad- ually. The cinder is then heated in the blue flame of a burner, and from the silica obtained a solid globule of glass
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
d bellies of varying widths for cutting tints and for gouging out the intervals. See tint-tool. Box-wood is used for the best work. Pear and sycamore are in favor for common work. The blocks are sawn across the log, so that the section or block stands with the grain vertical during engraving and in the press. The blocks, when their surfaces are finished, are of a thickness exactly equal to the length of a type, with which they are associated in the chase, for printing. Bewick, born 1753, died 1828, was the restorer of the art, giving grace and graphic effect, where conventional dreariness before existed. Stereotype or electrotype impressions are obtained from wood by the usual process of molding in plaster of Paris and subsequent casting, or brushing with graphite and electro deposit. Woodcuts have also been multiplied by molding with warm gutta-percha, and then taking a cast of the same gum, to be used as a woodcut in the printing-press. Wood′en leg. Inepte, f