Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 548
specific pur- EXGIXEERIXG DRA^yIXG. 531 pose of manufacture, it will be found best to arrange the necessary machinesas they should be, and then build the edifice to suit them. For defining theposition of a machine, the space it occupies in plan and elevation, the positionof the driven pulley or… … Lay down the outlines of an interior angle of the building, and dot in, ordraw in red or blue, the position and width of beams. This last is of impor-tance, as no driving-pulley can come beneath the beam, and this is also the posi- 532 ENGmEEKING DEAWING.
Mechanical drawing
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