Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 43
leaned after using as ink, if allowedto dry on them, will cause corrosion. The inside of the bladesshould be wiped frequently before refilling. Drawing Straight Lines. — In Fig. 2 is shown a front anda side view of a ruling pen held by the hand in the correctposition for drawing straight lines.… … Fig. 3. (A) Bow Pencil. (B) Bow Pen- ing pen in the straight upright position during the entirestroke. With the exception of very short lines, a full armmovement should be used. When within about one halfinch from the point at which a line is required to terminate,the full arm movement should be…
Mechanical drawing
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