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Document Max. Freq Min. Freq
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 50 50 Browse Search
Knight's Mechanical Encyclopedia (ed. Knight) 19 19 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. 16 16 Browse Search
George Bancroft, History of the United States from the Discovery of the American Continent, Vol. 3, 15th edition. 8 8 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 2. 6 6 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.) 5 5 Browse Search
the Rev. W. Turner , Jun. , MA., Lives of the eminent Unitarians 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 1740 AD or search for 1740 AD in all documents.

Your search returned 19 results in 8 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
cannon were introduced by Daniel Spekle, who died in 1589, and by Uffanus. Cannon of ice were made at St. Petersburg in 1740, and repeatedly fired, — a whim. All the rifled cannon in the British service of less than 6 3-inch caliber are breech-e first-named set. Cir′cu-lar mi-crom′e-ter. The circular or annular micrometer was first suggested by Boscovich in 1740, and was afterwards revived by Olbers in 1798. The principle is as follows:— If the field of a telescope be perfectly he inhabitants of Manchester, of cotton-wool brought from Smyrna and Cyprus. First made by machinery by Louis Paul in 1736-40. See Cottonmachinery. In the seventeenth century, cotton fabrics were so largely imported into England from India as t lady's skirts. The term is now commonly applied to the hoop-skirt, which has its periods of revival. Hoops were worn in 1740 three feet across the hips. Crippler. A board with a corrugated under-surface and a strap above to hold it to the h
Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
apped around the rod at right angles to the axis, the hypoteneuse gave the spiral of the screw, and the base the pitch. The subject of originating screws, which is closely connected with the dividing-engine, may be pursued in Holtzapffel (Vol. II. pp. 635 – 655). The methods of graduating instruments received much attention from Tompion (1660), Sharp (1689), the Sissons, and Bird (1745), the latter receiving pound 500 from the Board of Longitude for his method of dividing. Hindley, in 1740, constructed an engine for dividing circles, which also served to cut clock-wheels. Ramsden, in 1766, contrived his dividing-engine, and in 1777 received a reward of pound 615 from the Board of Longitude. Following Ramsden were the Troughtons, father and son, the latter of whom received the Copley medal of the Royal Society of England for his improved method of graduation. Ramsden's circular dividing-engine consisted of a large wheel moved by a tangent screw. The wheel was 45 inches i
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
which it is fed beneath the chisel, which receives the blows of a trip-hammer above. Many attempts have been made in this direction in France, England, and the United States. Among these may be mentioned Duverger, 1699; Fardouet, 1725; Thiout, 1740; Brachal and Gamain, 1756, 1778; Raoul, 1800; Ericsson, 1836; Robison, 1843. See also Skilton's machine, Ure's Dictionary, Vol. II. pp. 202-204, edition of 1860. See also Transactions of the American Philosophical Society, Vol. II., in which aer. The lever is again raised by means of a spring, and during its rise moves a ratchet-wheel connected with the support of the bed, which is shifted, together with the file, after each stroke. In Thiout's machine ( Traite de l'horologie, Paris, 1740), the file is attached to a screw-slide suspended at the end by pivots and covered with an anvil-plate of tin. The slide works upon a stationary anvil, and is worked by a feed-screw moved at intervals the distance of the pitch of a tooth by means
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
screw is turned by a treadle, the connecting mechanism being such that it may be adjusted to turn a whole revolution or any desired part of a revolution by a movement of the treadle. For this invention he received a reward of £ 600 from the British government, on condition of executing the divisions on the instruments of other makers at a fixed price for each instrument. An instrument of this kind, by Troughton & Sims, is in the Coast Survey Building, Capitol Hill, Washington. Hindley, 1740, had invented a dividing-engine, upon which this of Troughton is said to have been based. It also served for cutting the teeth for clockwheels. See also dividing-engine. In addition to original graduation by the beam compass and engine, the dividing of a scale or a circle is performed (and this is the most common practice with regard to ordinary instruments) by means of a dividing-plate, which is itself originally graduated with great care. This consists of a circle carrying a pivoted
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
ich see). Roemer, in 1678, suggested the divided objectglass micrometer, which was more perfectly adapted by Bouguer, seventy years afterwards. Boscovich, in 1740, invented the circular micrometer, which was used by Lecaille in 1742, and Olbers, 1798, and improved by Frauenhofer. Ramsden, about 1780, suggested the use of vex lens placed at the side of the object which is in its focus, is then employed. The light may be also concentrated on the object by a reflector. Lieberkuhn, 1740, devised a hollow concave reflector with a hole in the center, in which was placed a small lens, the foci of the lens and mirror nearly coinciding. This throws s described by Professor Balthasaurs in Erlange in 1710; but its practical execution is due to Dr. Lieberkuhn in Berlin, who made the first successful apparatus in 1740. It is founded on the same principle as the camera obscura, only in place of causing the lens or lenses to form inside of the apparatus a small image of large ext
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
ombined with gum or China clay by Montin, a German snuff-box maker, who is said to have learned the art from Lefevre about 1740. In 1745, the year fatal to Lochiel, it was introduced into Birmingham, England. The commoner varieties are prepared b in a violoncello, refer to the same versatility of expression. The name forte-piano occurs in Harris's English patent, 1740, but the instrument was a harpsichord. Silbermann made two hammer-harpsichords in 1736. His instruments, called forte- differ in its principle of action from the aeolipile of Hero, 150 B. C., or the reaction water-wheel of Barker, say A. D. 1740. We are much indebted to the worthy Otto Guericke, a magistrate of Magdeburg, for re-inventing the air-pump, about 1650ved to be kaolin. The French porcelain works were first established at St. Cloud, in 1695, by Louis XIV.; at Vincennes, 1740; removed to Sevres, 1786. The Meissen, Saxony, porcelain manufactory was established by Augustus II., Elector of Saxony
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
s below that of the atmosphere. See safety-valve. Fig. 5623 is a perspective view of a wagon-boiler, one half the Perspective view of a wagon-boiler. top being removed to show the interior. Steam-boilers, before the invention of Smeaton (1740-1770), were globular, or segments of spheres, and were heated from the exterior exclusively. Smeaton invented flue-boilers, so that the fire might reach the interior. He devised the horizontal, lengthened cylindrical boiler, traversed by a flue. rent quality are obtained. In employing wood charcoal from 1/70 to 1/90 of the weight of the iron is usually sufficient. From 1/60 to 1/40 produces a very fusible metal suitable for steel castings. e. Cast-steel. Cast-steel was invented in 1740 by Benjamin Huntsman, near Sheffield. His process was to place small fragments of blistered steel in a crucible of fine clay, place some broken green glass above, lute the cover, and then place the crucible in a furnace. When melted, the crucibl
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
into dress-stuffs is mentioned by Pliny, who ascribes the invention to King Attalus; but it was practiced in Egypt and in Oriental countries before the era of that monarch. Gold wire is found attached to rings bearing the date of Osirtasen 1., 1740-1696 B. c. In ancient times, and, indeed, during the Middle Ages, gold and silver were almost, if not the only, metals which were formed into wire. In the reign of Elizabeth, iron and brass wire were both manufactured and imported into Englandrial by immersion, and those in which the material is forced into the pores in a vaporiform state. The first of these processes appears to date back no farther than the last century; the latter is of still more recent introduction. As early as 1740, Fagol, a Frenchman, experimented with solutions of alum, sulphate of iron, and other substances, in which he immersed the wood for several days. In 1756, Haller recommended the use of vegetable oil for this purpose. Jackson, in 1767, proposed