Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 271
Fig. 301. Steel Tape … Fig. 302. Adjustable Square Calipers. Calipers are used for obtaining measurements oflength or diameter where the scale cannot be applied directly.After they are set to the distance which is to be measured theyare placed upon a scale and the distance read. Fig. 303 showstwo forms of calipers, one…
Mechanical drawing
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