Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 36
,J I 1 colt \ /1 Y¥ 1 V /1 ^iv Prob. 40. Ventilator, Fig. 40. Scale, 2=V-0\ Placethe center of the H projection at 2%-S%^^, using a C-sizesheet. The bottom of the cylindrical piece, in the V projection,3%^ above the lower border. In the lay-out of the bottompiece, make the seam down the longest… … FIG. 40 36 Prob. 41. Transition Piece, Fig. 41. Scale, 3=l-0.See second method of finding the true length of line, page 10.
Projection
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