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Document Max. Freq Min. Freq
Harper's Encyclopedia of United States History (ed. Benson Lossing) 74 74 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 36 36 Browse Search
George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 4, 15th edition. 29 29 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) 25 25 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 24 24 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. 10 10 Browse Search
The Cambridge of eighteen hundred and ninety-six: a picture of the city and its industries fifty years after its incorporation (ed. Arthur Gilman) 9 9 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.) 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. 4 4 Browse Search
Historic leaves, volume 4, April, 1905 - January, 1906 4 4 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1750 AD or search for 1750 AD in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
neck to prevent the escape of gas, depositing the ingredients in such a manner that they would not communicate with each other until after the vessel was corked. In this case the gas evolved in a vial nearly full and closely corked suffers such a degree of compression as to greatly promote its combination with the water. M. Venel supposed 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 escaping gas. He found upon experiment that the impregnation was accelerated by pouring the water from one vessel into another; but it did not occur to him till t
Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
manufactory being established at Chaillot, near Paris. Workmen from France introduced carpet-making into England about 1750. A carpet-factory was established at Axminster, 1755, the year of the Lisbon earthquake. There are several characterisd in 1564, and coaches for hire plied in London in 1625. Stage coaches were introduced into England by Jethro Tull, about 1750, and were employed to carry the mail in 1784. Before this time it was carried on horseback. See coach. See vehicles e in powder, litharge, combined, 100 parts; boiled linseed-oil, 7 parts. Mix. Similar to Loriat's French mastic, invented 1750. mortar. a. Sharp, clean sand, 3; freshly slacked lime, 1. See beton; stone, artificial; mortar. b. Parker's cemenglish fireplaces. In some of the Louvre fireplaces the jambs have an angle of about 45° These were probably erected about 1750, by Gabriel, under the orders of M. de Mavigny. Gauger had previously (1715) given to the moving a parabolic curve. Coun
Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
s on which the action of the Leyden jar depends, showing that the inside is positively and the outside negatively electrified, and that the shock is produced by the restoration of the equilibrium when communication is established between them. Monnier the younger discovered that the electricity which bodies can receive depends on their surface rather than their mass, and Franklin soon found that the whole force of the bottle and power of giving a shock is in the glass itself ; he farther, in 1750, suggested that electricity and lightning were identical in their nature, and in 1752 demonstrated this fact by means of his kite and key; about the same time D'Alibard and others in France erected a pointed rod forty feet high at Marli, for the purpose 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 thi
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
etting-needle from the same place. Flax was exported from Egypt to Gaul as late as the Christian era, and was ordered to be grown in England by statute of Henry VIII., 1533. A braking and scutching machine was run by water-power in Scotland in 1750. To prepare flax for manufacture, after the removal of the seeds, the hare (useful, fibrous portion) is separated from the boon (the refuse portions of the stalk). For this purpose the uniting gluten must be dissolved and removed. This is effe. Fly—rail. A hinged cleat or bracket attached to the frame of a table, and turned out to support the leaf. Fly—shut′tle. A shuttle driven by a picker, in contradistinction to one thrown by hand. The picker was invented by Kay, about 1750. Fly—trap. A device for catching flies. There are several forms. In Fig. 2052, the faces of the bait-pans are brought together by spiral springs on the removal of the detent-pin. On separating the pans for resetting, the flies drop into
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
In 1726, Dr. Hales, in his work on Vegetable Statics, states that 158 grains of coal yield 180 cubic inches of gas. In 1750, Watson, Bishop of Llandaff, distilled coal, passed the gas through water, and conveyed it in pipes from one place to anoton to the intimateness of the contact of the gas and water therein. Dr. Watson, Bishop of Llandaff, announced the fact in 1750, that the inflammability of gas was not affected by contact with water. The washer is the third in the series of gas-makiroportionate correction on each angle, rather than to trust to the uncertainty of a division to thirds or fifths. Bird, 1750, subsequently improved the system by constructing scales of equal parts, enabling him to preserve the division of 90° by s（Fabric.) A coarse stuff of silk, or silk and mohair. The name is French (gros-grain, coarse texture). Admiral Vernon, 1750, introduced rum and water as a ration on board ship, and wore a grogram coat. The soubriquet Old Grog referred to the coa
Knight's Mechanical Encyclopedia (ed. Knight), H. (search)
driving another off the nest. Her-ba′ri-um. A collection of dried plants. Aristotle is considered the founder of the philosophy of botany, 347 B. C. The Historia Plantarum of Theophrastus was written about 320 B. C. Authors on botany were numerous at the close of the fifteenth century. The Botanic Gardens of Padua, Leyden, and Leipsic were established respectively in 1545, 1577, 1580; the Jardin des Plantes, in Paris, in 1624; Oxford, 1632. The system of Linnaeus was made known in 1750; and Jussieu's system, founded on Tournefort's, and called the natural system, in 1758. The latter is now accepted by such authorities as Lindley and London. The Linnaean was founded upon sexual differences, the classes being determined by the number of stamens, the orders by the number of pistils. The natural system of Jussieu is founded upon modes of growth and fructification. At the death of Linnaeus, the number of species described was 11,800. The number of species now recorded is pr
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
tely, and discharge by separate holes through the clay tuyere which is introduced at an angle near the bottom of the upright furnace. These Indian furnaces are miniatures of those in Styria, described in the work of Jars, a French metallurgist, 1750. The ores there worked have a notable percentage of manganese, which affects the result, being seemingly favorable to the retention of a certain amount of carbon, but resisting the combination of the larger amount necessary to make castiron. Sron at the day when the discovery was made, it became necessary to subject it to a farther process, in order to burn out the greater portion of the carbon and silicon and render it malleable. The refining process observed by M. Jars in Sweden, in 1750, is identical with that described by Aiken in 1836 as having been used in India for a length of time not now readily ascertained. The block of crude iron is laid, covered with charcoal, on the floor of the furnace, with one end projecting over
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
and dates of the inventions in the line of paper-making machines. Some collateral points of interest are also noted:— 1750. Woven paper-molds introduced by Baskerville. 1759. The rag-engine introduced into England from Holland, where it was invented about 1750. 1790. The practice of bluing paper is said to have originated about this time from the circumstance of an English papermaker's wife having accidentally dropped her blue bag into some pulp in an advanced state of preparation. drawn by a cord. In the power-loom the driver is on a vibrating staff. The picker is the invention of John Kay, about 1750, and the shuttle thus operated was called a fly-shuttle, from the rapidity of its movement as compared with the hand-shuttof filth were thrown into the public streets. This was forbidden in Paris by an ordinance in 1395. It was practiced till 1750 in Edinburgh. Three centuries since the royal residences of Spain were destitute of privies, while the circumnavigators f
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
re placed has exterior longitudinal radial wings to carry of the dust. Rag-en′gine. （Paper-making.) The machine in which rags are partially comminuted. Until the present century, rags were reduced to pulp for paper by means of mashing and incipient fermentation. Stamping-mills were then introduced, but the iron stamps in oak mortars are stated to have been so slow that 40 pairs working 24 hours would only reduce 112 pounds of rags. The rag-engine was invented in Holland, about 1750, but it was many years before it reached England. It consists of an oblong trough containing one or more rotating cylinders having cutters on their peripheries, which work against similar cutters fixed in the bottom of the trough, which is curved to correspond with the cylinder and form a partition over which the stuff passes and repasses during the process of comminution. Rag-engine. Fig. 4112 has a spiral flange on each end of the cylinder, to prevent the collection of rags around
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
7, 1869. No. 99,853.CrandellFeb. 15, 1870. No. 138,053.StebbinsApril 22, 1873. Instruments for laying out Stair Curves. No. 5,380.WoosterDec. 4, 1847. No. 18,110.StewartSept. 1, 1857. No. 24,763.ShaefferJuly 12, 1859. No. 66,796.ClowJuly 16, 1867. No. 75,423.HooverMar. 10, 1868. No. 97,707.SchollarDec. 7, 1869. Spi′ral pump. A form of the Archimedean screw water-elevator, consisting of a pipe coiled spirally round an inclined axis. It is said to have been invented about 1750 by Andrew Wirz, a pewterer of Zurich, and was employed in Florence with some improvements by Bernoulli, in 1779. See screw. Spi′ral-rib bit. A wood-boring tool adapted to be used in a brace. It has a spiral flange twisted around a cylindrical shaft. See bit, o, Fig. 695. Brick-machine. Spi′ral screw. A screw formed upon a conical or conoidal core. In the example, it serves as a driving-screw to force clay from the hopper into the molds beneath. Double helical spring. <
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