. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . native country, but throughout South America, Europe, Australasia,and parts of Africa. Some 3 ft. of twine will bind a convenient sheaf. It must be strongenough to bear about 70 lbs. tensile strain when made with a loose enough twist to avoidkinking, and must be spun free from swells and bunches unfit to pass through the mechanicalknotter. The finer it can be spun, without sacrifice of necessary tensile strength, th
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . native country, but throughout South America, Europe, Australasia,and parts of Africa. Some 3 ft. of twine will bind a convenient sheaf. It must be strongenough to bear about 70 lbs. tensile strain when made with a loose enough twist to avoidkinking, and must be spun free from swells and bunches unfit to pass through the mechanicalknotter. The finer it can be spun, without sacrifice of necessary tensile strength, the moreeconomical its use. In practice, it runs from about 400 to 600 ft. per lb., making it cost peracre, at current prices, from 28 down to about 18 cts. Other fibers besides those named areused to a moderate extent, also mixtures of the above with jute, ramie, and even Americanhemp. The Lowrv twine is the latest improvement in grain-binding material—an improve-ment in the direction of economy. It is made of the tough slough-grass which grows abun-dantlv on low-lying wet land throughout the United States in the great prairie basins, and is 420 HARVESTING-MACHINES, Fio. 8.—Knotter complete. deemed useless for any other purpose. It is twisted or spun, without preliminary preparation other than combing it straight, into a uniform, strong twine, by special machinery devised by George A. Lowry. of Iowa, which also at the same timewraps it with light cotton thread, at the instant beforespooling, in a long, open spiral turned opposite to tliedirec-tion of the twist given the twine in spinning. The thread-wrapping serves to hold the grass-twine twi^t firm, and alsoprevents protrusion of short ends that would possibly inter-fere with the work of a mechanical knotter. By enlargingand otherwise slightly modifying the lines of the knottingmechanism of grain-binders, this grass-twine and the or-dinary hempen twines can be used interchangeably on thesame machine—an obvious pra
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
