Fry, Horace Pugh. [from old catalog] · Philadelphia · leaf 9
Fig. 3. I 4. Chisel points must be used on all instrument leads andpencils. Cut the wood back for IJ, exposing the lead for f,then flatten the lead by rubbing opposite sides on a file and bringto a knife edge by using a slight rocking motion. This point willhave the appearance of the ruling pen…
Mechanical drawing
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