Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 18
heir use,care must be taken to have the French curve exactlycover as many points in the line as possible, and thenonly the central points should be connected. If theline is drawn to all the points covered by the Frenchcurve, it will generally fail to continue smoothlythrough the points in the line… … lO MECHANICAL DRAWING. 12. Penciling. — Penciling is generally done to prepare for ink-ing or for the making of tracings on tracing cloth, but sometimespractical shop drawings are finished in pencil lines. In this casethe drawing is generally little more than a rough diagram, hastilymade, and not…
Mechanical drawing
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