Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 175
n or dull from use it should besharpened as follows: 1. Provide a close grained oilstone. 2. Close the nibs until they just touch each other. 3. Hold the pen on the stone as in drawing a line and moveit back and forth, revolving it slowly in the plane of motion until 170 MECHANICAL DRAWING the nibs… … Fig. 175. Sharpening the Pen. Evening the Nibs
Mechanical drawing
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