Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 278
the form of which makes it necessaryto use the caliper in measuring the distance between the centers MEASUREMENTS 273 of the two holes. The corners of cast parts are usually roundedor filleted. The radii of these curves are not easily measured, butusually it is unnecessary to measure them… … Fig. 313. Typical Objects for First Drawing from Model scale opposite the other tangent point. A very satisfactorymethod applicable in some cases is to place the object over a sheetof paper and trace around the corner or fillet with a sharp pencil.The center of the arc thus obtained may be found by…
Mechanical drawing
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