Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 125
qual to the radius of the arc.With irregular shapes the area is sometimes divided approxi-mately into regu-lar figures, thedimensions forwhich are ob-tained by apply-ing the scale tothe drawing. This is illustrated in Fig. 274 where the dash linex-x is drawn so that the area B appears to be equal… … r/g. sr^
Mechanical drawing
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