Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 380
extended for any proportion. 1531^. TRACING BAR. —The yoke-shaped needlebar has tracing points inline with the gimbal ringbearing. The points may be … 1531/. REFLECTING DRAW-ING BOARD.—A vertical plate ofglass in a frame on a drawing board.The picture on one side and a plainsheet of paper on the other side ofthe glass. On looking into theglass on one side the picture isplainly projected on the other, andcan be readily traced with a pencil. 1531^.…
Mechanical movements
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