Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 37
5, the pen and needle-pointshould be kept perpendicular, and in the right position. Shouldthe straps and split tubes at any time work a little loose, they caneasily be tightened by a slight pinch with the thumb and finger. 34 PEAGTIGAL DBAUGETSMEITS WORK. Should a pencil-point be wanted instead of… … Fig. 46.—Cheap Beam Compass. corks, such as are used in pickle bottles. Holes for the receptionof the lath and drawing pen, and also for the pricker or needlestuck into a penholder, are burnt and cut through the corks as
Mechanical drawing
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