Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 378
1530. PERSPECTIVE CENTRO. LINEAD.—The edges of legs on the sides a, by and c must be in line with their common Lzn axis, with clamp screws to hold the movable legs in their set position. The directing pins b and c should be set on the radial lines of the back point of the perspective, when the long…
Mechanical movements
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