Fry, Horace Pugh. [from old catalog] · Philadelphia [The John C. Winston co.] · leaf 19
aded straight lines. Dotted lines are not shaded.Lines, letters and figures must be black. If they have beenlightened by erasure go over them until they are black. 4. If the surface of the paper has been roughened by erasures,so that ink will spread, it can be restored by rubbing with a soap-stone… … 17 DIMENSIONING. 1. In dimensioning a drawing, full lightlines are drawn to connect the points between which a dimensionis to be given. The lines are terminated by arrow heads, and thedimension is written in a break, usually but not necessarily in thecenter of the line, provided for that purpose,…
Mechanical drawing
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