Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 28
ens, with ascrew and a milled head for regulating thedistance between them. It is particularly DBA UGHTSMENS INS TR UME NT 8. 25 useful where the lines to be drawn are curved or of irregularform. A ruling pen especially designed for drawing curved lines isshown in Fig. 23. The handle is tubular,… … Fig. 20.—Lift-up Nib. <i|l.Mlljft Fig. 21.—Square Handled Pen.
Mechanical drawing
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