. Memoirs of the American Academy of Arts and Sciences. arns was built. This memorandum made Nov. 5, 1829. D. T. MEMOIR OF DANIEL TREADWELL. 369 Tlie flax, being supplied to the cvliiider, and passed between the rollers, is drawn througlithe points as through a hatchel. Several of these rovings are then just put together, and theprocess is repeated until the fibres are sufficiently reduced for spinning. The first of the five operations of rope-making consists in drawing out the fibresof hemp into parallel lines, or splitting the fibres, if need be, and removing loose,sliort portions of the mat
. Memoirs of the American Academy of Arts and Sciences. arns was built. This memorandum made Nov. 5, 1829. D. T. MEMOIR OF DANIEL TREADWELL. 369 Tlie flax, being supplied to the cvliiider, and passed between the rollers, is drawn througlithe points as through a hatchel. Several of these rovings are then just put together, and theprocess is repeated until the fibres are sufficiently reduced for spinning. The first of the five operations of rope-making consists in drawing out the fibresof hemp into parallel lines, or splitting the fibres, if need be, and removing loose,sliort portions of the material, the tow, and any dust or foreign matter which wouldinterfere with the subsequent processes. When this is done by hand, the workmantakes a mass of the material by one of its ends and draws it through a number oflong prongs of polished steel set in a block of wood called a hacMc, repeating themovement until the fibres are parallel and clean; he then takes the mass of hempby the other end, and does the same for the end which before he had Fig. 1. Mr. Treadwells machine for performing the same work is described in hisspecification as an improved machine for dressing, combing, or hatchelling hemp,flax, wool, and other fibrous substances.* It consists essentially of two cylinders ofunequal diameter, set in a wooden frame, with their axles parallel. The great cylin-der is completely covered with rows of steel points or teeth, c c, curved in thedirection of its motion; its shaft runs in boxes on the frame, and is furnished withfixed and loose pulleys, mm, nn, ee, dd. Fig. 2. On the same frame is placed thesmall cylinder, covered with straight teeth smaller than those of the great cylinder. * More commonly called a circular hatclitl or lapper. o/ 0 MEMOIR OF DANIEL TREADWELL. The cogwheel k, Fig. 1, fixed to the small cylinder, is driven by the pinion l, Fig. the small cylinder, just above the points of the teeth and parallel to the axisof the cylinder, are sever
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