Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . d in towing t!ie boats on the Danubebetween Pesth and Vienna. Hempen ropes were used on board the Syra-cusia, built for Hiero, as recorded by Mos-chion. There are many other notices of hempby later authors. It was imported in the hankor bale from the country of the Hhdrtauivis,which empties into the Vistula. The Greeksand Romans used tow for calking the seams of
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . d in towing t!ie boats on the Danubebetween Pesth and Vienna. Hempen ropes were used on board the Syra-cusia, built for Hiero, as recorded by Mos-chion. There are many other notices of hempby later authors. It was imported in the hankor bale from the country of the Hhdrtauivis,which empties into the Vistula. The Greeksand Romans used tow for calking the seams of theirvessels, but did not cultivate it before the Christianera. Hemp was known to the Roman naturalists, butdoes not seem to have been used as a fiber plant. It was known to the , and the modeof preparing and beating it is given by cloth Ixcame coiumoii in Middle and South-ern Europe in the thirteenth century. For specific list of appliances in the treatment andmanufacture of hemp and other fiber, see Cotton,Fl.\x, Wool, Hejip, etc., Appli.^nles. Hemp—brake. A machine in which rotted andsubsec|Ueiitly dried hemp-stalks are beaten to removethe, bark and cellular pith from the fiber. Among Fig. Hemp-Brake. the foi-ms of the machine may be noticed the simplesword or slats driven between two slats set edge up ;the hemp is laid crossways of the slats, and is ^-iolent-ly bent by the blow, cracking off the scale of bark andpowdering the pith. In Fig. 2499 the slats of the reciprocating portionand of tlie bed are arranged in gangs, to break thestalks which are laid between them. Thebrake is in a gate which moves in guides b} meansof a jiitman from a wheel above. Other forms of brakes have rotatory motion. Aseries of fluted roUei-s whose projections interlocklike cogs. Slatted interlocking cylinders. Planetarysystems of fluted rollers, operating on beils of flutedrollers. In the example, the hemp is passed between Fig. 2500.
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