hide Matching Documents

The documents where this entity occurs most often are shown below. Click on a document to open it.

Document Max. Freq Min. Freq
Harper's Encyclopedia of United States History (ed. Benson Lossing) 87 87 Browse Search
Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register 55 55 Browse Search
George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 6, 10th edition. 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. 26 26 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 12 12 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) 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.) 8 8 Browse Search
Edward L. Pierce, Memoir and letters of Charles Sumner: volume 2 4 4 Browse Search
Historic leaves, volume 4, April, 1905 - January, 1906 3 3 Browse Search
Cambridge History of American Literature: volume 2 (ed. Trent, William Peterfield, 1862-1939., Erskine, John, 1879-1951., Sherman, Stuart Pratt, 1881-1926., Van Doren, Carl, 1885-1950.) 3 3 Browse Search
View all matching documents...

Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for 1772 AD or search for 1772 AD in all documents.

Your search returned 12 results in 8 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
iestley 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 the year 1772 that this could be effected by the gases dislodged from decomposing chalk and other calcareous substances confined in an air-tight vessel. Dr. John North's apparatus for impregnating water with carbonic acid was invented in 1775. Between the years 1807 and 1852 thirty-one English patents were granted for apparatus and methods for preparing aerated water, and fifteen patents for vessels to hold such waters, and for methods for bottling. The most common beverage is Carbonic Acid Water, gene
Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
-cut diamond of 139 1/2 carats. Sir Isaac Newton suggested that the diamond is combustible, but the first to establish the fact were the Florentine Academicians, in 1694; they succeeded in burning it in the focus of a large lens. Lavoisier, in 1772, examined the results of combustion, which showed it to be pure crystalline form of carbon. The uses of the diamond include the following:— Abradant for various purposes, in wheels, laps, and slicers. Stone drilling and sawing. See carboy report is made out. The duty of these engines has been gradually improved. It is estimated by the number of pounds raised one foot high by a bushel of Welsh coals, 94 pounds. Pounds, 1 foot high. In 1769, the Newcomen engine5,500,000 In 1772, the Newcomen engine, improved by Smeaton9,500,000. In 1778 to 1815, the Watt engine20,000,000 In 1820, the improved Cornish engine, average duty28,000,000 In 1826, the improved Cornish engine, average duty30,000,000 Pounds, 1 foot high.
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
has a small thin roller pivoted at its lower extremity, which in its passage over the glass separates the particles in a manner similar to the diamond. The spatula at the other end is used for puttying, etc. The diamond is crystallized carbon. Diamonds were first brought to Europe from the mine of Sumbalpoor. The Golconda mines were discovered in 1534. The mines of Brazil in 1728. Those in the Ural in 1829. The great Russian diamond weighs 193 carats; cost, £ 104,166 13 s. 4 d. in 1772. The Pitt diamond weighed 136 carats; sold to the king of France for £ 125,000, in 1720. The Koh-i-noor was found in 1550. It belonged in turn to Shah Jehan, AurungZebe, Nadir Shah, the Afghans, Runjeet-Singh, and Queen Victoria, 1850. It originally weighed 800 carats, was cut down to 289 carats by an unskilful Italian, and then to 102 1/4 carats to perfect its shape. See diamond. Pliny speaks of adamant as the hardest of all materials, and it may mean the uncut diamond. We do not k
Knight's Mechanical Encyclopedia (ed. Knight), H. (search)
Hy-drau′lic ram. A device by which the fall of a column of water in a tube is caused to elevate a portion of itself to a hight greater than that of its source. This depends on the well-known law of mechanical force, that the effect produced by a body is as its weight multiplied into the velocity, its absolute force constituting the momentum. Hydraulic rams. This principle was first practically applied in the construction of the water-ram by Mr. Whitehurst of Derby, England, in 1772. Whitehurst's ram is shown in A, Fig. 2618. It was not automatic, but depended upon the opening and shutting of a cock from which water for domestic purposes was drawn. The operation is as follows: on opening the cock a, water from the cistern flowed down the pipe b, and on closing the cock, the sudden stoppage of the water caused the valve c to open, and a part to be forced through into the air-chamber d; the momentum imparted to the water would be sufficient to carry it to a hight as mu
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
ions of each metal in the alloy. See alloy. The English pewterers have three varieties, plate, trifle, and ley pewter. The plate-pewter has, tin, 100; antimony, 8; bismuth, 2; copper, 2. The trifle-pewter has, tin, 83; antimony, 17; with a good deal of lead occasionally. The ley-pewter consists of, tin, 4; lead, 1. Some inferior varieties contain nearly 50 per cent of lead. To remedy this debasement and establish a uniform standard, the English Pewterers Company attempted in 1772 to regulate the quality by comparison of its weight with that of a given bulk of tin; for this purpose a button of pure tin weighing 182 grains was employed; a similar button of plate-pewter would weigh 183, grains; of trifle, 185 1/2 grains; and of ley, 198 1/2 grains; equal parts of tin and lead weighing 232 grains. Their rule, however, was not much regarded. The finest pewter, frequently called tin and temper, is produced by adding temper, composed of 2 parts tin and 1 copper, in the p
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
e shed, the shuttle produces no friction. The shuttle is held down by a projection above, against which the rollers d d play The upper threads of the shed pass between this projection and the rollers d d. See positive-motion loom, Fig. 3903, page 1772 Positive-motion shuttle. The shuttle for haircloth weaving has no pirn, but a springcatch to hold the ends of the hair forming the weft, and carry them through the shed when the shuttle is thrown. 2. (Sewing-machine.) The sliding threadas dangerous, and locked up in the arsenal. It is still to be seen in the Conservatoire des Arts et Metiers at Paris. Cugnot was born in 1729, and died in 1804. In 1769, Moore, a London linen-draper, patented an invention of this kind; and in 1772, Oliver Evans obtained an exclusive right from the State of Maryland for the use of a steamcar-riage devised by him. In 1786, William Symington constructed a model of a steamcarriage, but afterward devoted his attention to steamnaviga-tion.
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
angles answering to the intervals of time between two high or low tides. Tide-gate. The lock-gate of a tidal basin. See sluice. Tide-lock. One situate between the tide-water of a harbor or river and an inclosed basin when their levels vary. It has two pairs of gates. A guardlock. Tide-me′ter. See tide-gage. Tide-mill. A mill driven by a wheel set in motion by the tide. Mills of this kind were used in Venice as early as 1078, and they were employed in London in 1772. Generally the water is admitted as the tide rises, through a sluice over which the mill is placed, into a reservoir, turning the wheel in its passage through the sluice. At high tide the sluice gates are shut until the tide has fallen sufficiently, when they are again opened, and the water again turns the wheel during its outward passage. The mill may float on the surface of the water, rising and falling with the tide. The flood-gate in this case is arranged to have a simultaneous an
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
ably widened toward their outer extremities. Their maximum effect is attained when their outer ends revolve with about 2 1/2 times the velocity of the wind. In 1772 Andrew Meikle, of Scotland, invented a plan for automatically adjusting the area of the sails to the force of the wind; and in 1804, By water of Nottingham, Englaing, etc., according to material. The purposes are moldings, veneers, parquetry, the usual uses of horn, ivory, hard rubber. bone, etc. English patents from 1772 to 1835:— Nos. 1,011, of 1772, Whittock and Hodgson. Composition for carving, casting, or modeling, composed of cartridge-paper, glue, wheat-flour, beech-tree 1772, Whittock and Hodgson. Composition for carving, casting, or modeling, composed of cartridge-paper, glue, wheat-flour, beech-tree sawdust, and hemp. 1,573, of 1854, Hitchins and Batley. Shavings of wood, ivory, and bone, combined with glue and perfumes added, forming a plastic mass which may be molded by pressure. 2,232, of 1855, F. C. Lepage Mixture of sawdust and albumen, gelatine, or size, with vegetable, animal, or metallic powders. 2,359, of 1