Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 67
er makes thework of sectioning much harder ; the lines shouldnot be drawn first in pencil, but only in ink, as theneat appearance of the drawing depends largelyupon the uniformity of the lines in the section andthese lines are to be spaced by the eye only. Theprocess consists simply in ruling one… … Fig. 154.
Mechanical drawing · Machine design
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