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Knight's Mechanical Encyclopedia (ed. Knight) 60 0 Browse Search
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ip of the bottle B. The air is withdrawn from this latter to increase the rate of filtering. Spencer's filter. Claim.—First, in an atmospheric filter composed of the tunnel A, bottle or jar B, where the ores contain little or no gold, seldom exceeds seven per cent of the assay value. Spencer's amalgamator. Amalgam retort. Spencer, November 22, 1864. The treatment is designed to Spencer, November 22, 1864. The treatment is designed to desulphurize the ore simultaneously with its exposure to the mercurial fumes. The ore, finely pulverized, is placed in a vessel with a small amount of mercury, and the vessel then strongly closed. ted cartridges, which are put up in boxes containing 600 or 1,200, and repeating-cartridges, as Spencer's, in which the box is made to contain a multiple of the number which fills the breechchamber. stus;Hoke. 6. Boiler covering:Peters,1862. Hardy,1869.Selden and Kidd,1865. Murphy,1870.Spencer,1868. Riley,1871.French,1869. Murfey,1870. 7. For forming a radiating surface, as in gass
re generally furnished with swordbayonets. These all appear to have corresponded nearly in caliber and general dimensions with the modern French carabine. The Spencer rifle was extensively used by the cavalry of the Union army during the late war. Carbine-thim′ble. A stiff leathern socket, secured to a D-ring on the off-sreat deal of time lost in playing cards, said a moralizing gentleman. Yes, said a lady devotee, in shuffling and cutting. But then, how is it to be avoided? Lady Spencer may have been one of the parties conversing, and Mark Isambard Brunel, the philosopher, another. This talented mechanician, at all events, did invent a machine for shuffling and cutting playing-cards without the aid of the fingers, and did so at a playful request of Lady Spencer. Mr. Brunel's talent was most versatile. He constructed the Thames Tunnel; the block-making machinery of the Portsmouth (England) Dockyard; a theater in New York; a canal in New York State; the harbor defen
d and gradually corroded, while at the same time a beautiful arborescent precipitation of metallic silver took place on the lower wire. Acetite of lead and sulphat of copper were similarly decomposed and precipitated on the lower wire. — Monthly Magazine, August, 1800. In 1801, Wallaston demonstrated that a piece of silver in connection with a more positive metal placed in a bath of sulphate of copper became covered with copper and would stand burnishing. It was not until 1838 that Mr. Spencer gave it a practical bearing by making casts of coin and casts in intaglio from the matrices thus formed. Professor Jacobi of Dorpat, in Russia, had been an independent inventor, and in the same year brought forward specimens which were much admired and caused him to be put in charge of gilding the iron dome of the Cathedral of St. Isaac at St. Petersburg. This dome weighs about 448,000 pounds, and was electro-gilded with 274 pounds of ducat gold. The process, briefly described, is
arps's, Burnside's, Maynard's, Merrill's, and Spencer's. Sharps's rifle (O, Plate 16) has the ba80,512 Gallagher22,728Smith30,062 Gibbs1,052Spencer94,156 Hall3,520Starr25,603 Joslyn11,261Warn9. 26,362S. W. MarshDec. 9, 1859. *27,393C. M. SpencerMar. 6, 1860. 27,509N. L. BabcockMar. 20, 2. 35,488J. C. CookeJune 3, 1862. *36,062C. M. SpencerJuly 29, 1862. 36,466F. W. HoweSept. 16, 11864. 45,797J. RiderJan. 3, 1865. *45,952C. M. SpencerJan. 17, 1865. 46,671F. W. HoweMar. 7, 186. 58,444R. McChesneyOct. 2, 1866. *58,737C. M. SpencerOct. 9, 1866. *58,738C. M. SpencerOct. 9, C. M. SpencerOct. 9, 1866. 59,500C. C. ColemanNov. 6, 1866. 60,106H. H. WolcottNov. 27, 1866. *60,910T. W. LaneJan. 15,405M. J. ChamberlinFeb. 4, 1873. 135,671C. M. SpencerFeb. 11, 1873. 137,625C. SharpsApr. 8, 187. 409C. ParkhurstSept. 25, 1837. 34,319C. M. SpencerFeb. 4, 1862. 44,991E. WhitneyNov. 8, 1864n and A. C. CampbellOct. 21, 1862. *38,702C. M. SpencerMay 26, 1863. *38,935A. BallJune 23, 1863.
44, obtained a patent for hollow spheres of rubber, enclosing air and separated by disks of wood or metal, the whole enclosed in iron cases. In 1845, Walker and Mills patented rubber bags filled with air and enclosed in a case for use as springs. Fuller, 1845, cylindrical rings of rubber having perforated disks between them, and a guide-rod passing through the whole. These had a tendency to swell out at the center under pressure, breaking or injuring the material. To remedy this defect, Spencer, 1852, 1853, formed the rubber rings of the shape which they would assume under pressure, and surrounded them with an annulus of iron. These have been used as buffer, bearing, and draw springs for railway-carriages with satisfactory results. (See also car-spring.) Eaton, 1856, employs alternate thin plates of rubber and metal, adapted for springs of great resistance and little flexibility. Hodge, 1852, patented a compound spring composed of a block of rubber inclosed in a two-part casing
in the net, and the plait-thread surrounding the flowers. Me-com′e-ter. (Surgical.) A graduated instrument used at the Hospice de Maternite in Paris, to measure new-born infants. Med′al. An ancient or a memorial coin. Me-dal′lic En-grav′ing. In this beautiful art the direction and distance of the lines are so modified as to give the appearance of a figure or object in relief. It is executed by machinery. The machines of M. Collas and Mr. Bate, as well as those of Asa Spencer, Mr. Froude, and Mr. Saxon, are all improvements upon an apparatus described in a French work, the Manuel de Tourneur, about 1814. This machine will give a good general idea of the construction of these machines, and its operation is as follows: — The medal and the copper on which the medal is to be engraved are fixed on two sliding plates at right angles to each other, and so connected that when the plate on which the metal is fixed is raised vertically by a screw, the side holdin
ng-gunter. Pyx.Slings. Quant.Slip-hook. Quarter.Slip-shackle. Quarter-block.Slip-stopper. Rack.Smiting-line. Raddle.Smoke-sail. Rafting and booming logs.Snaking. Raising-iron.Snotter. Ratline.Sounding. Rare-hook.Sounding-apparatus. Reef.Sounding-line. Reef-band.Sounding-rod. Reef-point.Span. Reef-tackle.Span-block. Reeming.Spanish burton. Reeming-beetle.Spanish windlass. Relieving-tackle.Spanker. Rhodings.Spar. Rhumb.Speck-block. Ridge-rope.Speed-indicator. Riding-bitts.Spencer. Rig.Spider. Spike-tackle.Tiller-rope. Spilling-line.Tilt. Splice.Toggle. Splicing-fid.Top. Splicing-shackle.Top-chain. Spring.Top-gallant. Sprit.Top-hamper. Sprit-sail.Top-mast. Sprit-sail yard.Topping-lift. Spun-yarn.Towing-bridle. Spurling-line.Train-tackle. Square-sail.Trap-net. Standing-rigging.Traverse-board. Starboard.Traverse-table. Stay.Trawl. Stay-sail.Tree-nail. Stay-tackle.Trestle-tree. Steam-steering apparatus.Tricing-line. Steering-apparatus.Triatic stay
thing. Of gunpowder, see eprouvette; ballistic pen-Dulum. Of barrels, see gun-barrel. Of ordnance, see cannon; proof. The proof of spirit is ascertained by a hydrometer (Which see). The proof of a form or engraving is a trialim-pression. The proof of horizontality, see level. Of flatness, see proof-staff. Prov′ing-hutt. See proof-house. Prov′ing-ma-chine′. One for testing the resistance of springs or the strength of materials. See testing-machine. Spencer's machine for proving india-rubber springs by compression consists essentially of a strong iron frame, the top of which is provided with two longitudinal guide-bars; between these are arranged two sliding-plates, one of which is operated by a horizontal screw and lever, and the other rests against a piston in the frame whose end presses against the shorter arm of one of a system of three levers: the long arm of the lowest lever is connected with the hook of a spring-balance. The spring to <
en-sail. Specific names of various derivations:— Bonnet.Driver. Jib.Lug. Ring-tail.Save-all. Skysail.Spanker. Spencer.Trysail. Names derived from normal position:— Fore-and-aft sail.Studdingsail. Water-sail.Bonnet. By position57. 21,234JacksonAug. 17, 1858. 22,17HookNov. 30, 1858. 23,285BoyntonMar. 15, 1859. 24,027HookMay. 17, 1859. 24,061SpencerMay. 17, 1859. 24,973JenksAug. 2, 1859. 25,013HarrisonAug. 9, 1859. 25,262HarrisonAug. 26, 1859. 30,854HandieDec. 4,8,069WickershamAug. 25, 1857. 20,175SmithMay 4, 1858. 20,531SangsterJune 8, 1858. 21,461WoodruffSept. 7, 1858. 22,137Spencer et al.Nov. 23, 1858. 22,255MackenzieDec. 7, 1858. 23,157CooperMar. 8, 1859. 26,130SingerNov. 15, 1859. 26,366Mitchelication of the art of electroplating which originated with Volta, Cruickshank, and Wollaston, about 1800-1801. In 1838, Spencer, of London, made casts of coins and cast in intaglio from the matrixes thus formed; in the same year Jacobi, of Dorpat,
Artificial heat is applied in some stages. To-bac′co-cut′ter. 1. A machine for shaving tobacco-leaves into shreds for chewing or smoking; the former is known as fine-cut in this country; the latter is the usual form of smoking-tobacco in Europe, where the granulated tobacco is (or was) not preferred. Fig. 6486 is a fine-cut machine, in which the leaves are driven along a square trough by a plunger, which is moved by a screw, a certain distance between each cut of the knife. In Spencer's machine, patent 75,805, the stock is carried forward upon an endless apron, and compressed between the upper and lower cylindrical rollers and the inclined, smooth, metallic sides. The knives are carried in contact with an emery-wheel at each revolution. The emery-wheel rotates at high speed within a case which is filled with steam, and has a longitudinal aperture allowing the contact of the knives and wheel, and also the passage of steam to moisten the knives and prevent the accumulati
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