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 . lifts the bight of the rope, ready for another etfectivp stioke. The lathe of the native East-Indian consists of two upright pieces of wood driven into the ground at the requisite distance for Iiohliug the work, with spikesPi, 9(wi projecting hori- *^e- 283L zontally. T h e work is held be-tween these spikesandniade torotatebackward andfiirwanl by a bowbelli in
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 . lifts the bight of the rope, ready for another etfectivp stioke. The lathe of the native East-Indian consists of two upright pieces of wood driven into the ground at the requisite distance for Iiohliug the work, with spikesPi, 9(wi projecting hori- *^e- 283L zontally. T h e work is held be-tween these spikesandniade torotatebackward andfiirwanl by a bowbelli in the lefthand, and thestring of which ispassed once roundthe wood. shows a poleand treaille latheused by peo|ileof the CarjiatliianLathi ofihe Carpathian. Mountains. The worko issuspend- ed on centers b b, ami rotated by the cord which. connects the end of the spring-pole with the treadlec. The chisel rests upon the bar. The earliest screw-lathe known is one described in; the work of .Taques Besson (see Plate 9 of that work)published at Lyons, France, in the year 1578. Thiscurious lathe, which is also illnstrated and describedon page 616, Vol. II., HoltzapllVls Turning and Me-chanical Manipulation, has its tool traversed along-side the work by means of a guiile-screw, which is; moved simultaneously with the work to be operatedI upon, by an arrangement of pulleys and cords clearlyshown in the engraving. Bessons machine wascapable of cutting screws of any ]iitih by the use ofpulleys of ilitiercnt diameters, anil could be made tocut right-hand or left-hand sciews at ]ileasure, bycrossing or uncrossing the cord. The inventor its application to elliptical, conical, orother A nietal-ttirning lathe, in its most essential de-tails, is found described on l>age 214of Mechanick , or the_ Doc
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