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 94
Fig. 163 the dimensions tell the size. These are two operations and bothshould be kept in mind. Dimension Lines. — Dimension lines show where the figuresapply to the drawing. They are terminated by arrow heads.The arrow heads should be about twice as long as they are wide. … Fig.184- Fig. /as Fig. 183 shows the construction of an enlarged arrow head, andits proportions. Fine full red ink lines are sometimes used fordimension, center, and witness lines. The arrow heads andfigures are always black. The figures and notes should alwaysbe placed so as to read from the lower…
Mechanical drawing
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