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rst. The ease of the soldier in carrying his knapsack, etc. has been attempted to be secured: 1. By making one portion of his accouterments balance another, as in Mann's, Mizner's, and Wood's; 2. By a saddle-piece resting on the hips, as in Dickey's; 3. By suspension-hooks on the shoulders, as in Sweeney's; 4. By a frame reachs in Baxter's; 5. By modes of shifting the weight occasionally to vary the point of pressure and relieve the otherwise constant strain, as in Short's and Sus's. Mann's mode of slinging accouterments. Secondly. In arrangements for making the knapsack do service as a shelter, couch, or mattress. Thirdly. In devices for these section (Fig. 473) shows the shape of an axe without the steel, which is subsequently inserted into the notch and secured by welding. Lippincott. White. Mann. Axe-blank. Lippincott. The bifurcated edges of the steel bit in the example (Fig. 474) are inserted into a scarf on each side of the stock, which is thus
Gladstone patented his front-draft, side-cut, revolvingknife machine. A segment bar with fingers gathered the grain and held the straw while the knife cut it, the fingers having the function of shear-blades. The forward draft was also adopted by Mann in 1820, and by Ogle, 1822, in his reciprocating cutter-bar machine. 1807. Salmon had a machine with some new features,—a row of vibrating knives over stationary blades; fingers to gather the grain to the cutters; a rake, suspended and reciproc off to the side The machine was pushed ahead of the horse, or was propelled by hand. The machine of Bell, 1826, which was brought forward to confound the American exhibitors in 1851, has the same kind of cutters, and was also propelled. 1820. Mann had revolving rakes on a vertical axis, to sweep the standing grain past the cutter, and deliver it in a swath. 1822. Ogle shows the first reciprocating knife-bar. It is the type of the successful machines, but was constructed so poorly that it
.May 21, 1872. (Reissue.)4,909HornMay 21, 1872. 130,763SullivanAug. 20, 1872. 131,027RodierSept. 3, 1872. 143,589PowellOct. 14, 1873. 146,736WilsonJan. 20, 1874. 4. Embroidering. 13,662SingerOct. 9, 1855. 31,864BoydApr. 2, 1861. 33,556MannOct. 22, 1861. 42,770HorneMay 17, 1864. 43, 289CrittendenJune 28. 1864. 51,239StevensNov. 28, 1865. 52,374BoydJan. 30, 1866. 65,768RoseJune 11, 1867. 87,633CarpenterMar. 9, 1869. 89,446ThomasApr. 27, 1869. 91,708BoydJune 22, 1869. 91,898Baed air when it entered this third cylinder. He also proposed to use an eccentric on the driving-shaft to work a pump for compressing air into either of the cylinders when the carriage was going down hill, and to serve as a brake in descending. Mann, June 1, 1829. Application of air condensed by steamengines, wind or water mills, or other mechanical power, as a motor for vessels or carriages. The air to be condensed in portable reservoirs, to be carried on the carriages, condensed by steam-
trough forming a drain. Trol′ley. A vehicle on the ways or tracks of iron works. Troll′ing-spoon. A bait trailed behind a boat to attract and catch fish. The name is derived from the frequent use of a silvered spoon bowl to which the hook is soldered, and which is connected by a snood to the line. In the example, the bright piece a is rotated as it is drawn through the water, and reflects the light in different directions, like the silvery scales of a small fish in motion. Mann's trolling-spoon. Troll-plate. (Machinery.) A rotating disk employed to effect the simultaneous convergence or divergence of a number of objects; such as screwdies in a stock, or the jaws of a universal chuck. Trombe. See trompe. Trom-bone′. 1. (Music.) A wind-instrument of metal, whose middle piece slides telescopically upon the mouth-piece and pavilion ends. Its capacity for modulation of tone by means of its slide gives it command over every tone within its comp