Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 203
184 MECHANICAL DRAMNG. of structural iron draughting, and is to be first constructed inpencil, to a scale of i = i, without any letters or figures, andsubmitted for inspection, then inked in, and the letters and figuresdrawn last. Space the lettering of the title so as to add the line Scale.... i =… … Fig. 73 199. Sheet No. 7, Plate No. 33.—This sheet is given toillustrate methods of representing screw-threads, and as a guidefor drawing bolts and nuts. Fig. 1 represents a hexagonal-headedbolt and nut; to draw the figure, locate the center line, and withdimension D—the diameter of the bolt—equal…
Mechanical drawing
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