Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 18
nished in colour. (Frontispiece.)XY. Front elevation of a building, in colour.XYI. Finished perspective drawing, with shades and shadows, of a large bevel-wheel and two pinions, with shifting clutches. Page 160.XYII. Plan, elevation, and section of bevel-wheel, pinion, and clutches,shown in… … Most persons, at some time, have made use of the simple drawing instru-ments, as pencils, straight edges or rulers, dividers and compasses with change-able points, and many suppose that there can be no skill in their use; but toone critical in these matters there are great differences, even in…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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