Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 114
Adjustingscrew ^Needle point LeadFig. 51. … Adjusting-screw^/ Fig. 52. The bow-pen should always be used on small work, and infact wherever possible, as it is easier of manipulation than thecompass. 92. The Bow-pencil.—Fig. 51. The bow-pencil is a smallcompass with the pencil-leg only, and is covered by the remarks 96 MECHANICAL DRAWING. on…
Mechanical drawing
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