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 60
? Fig. 123. The shade line made in this way must not bedrawn too heavy ; to assure the success of this op- ROGERS DRAWING AND DESIGN. 71 eration it is necessary to have a very sharp needlepoint in the compass in order not to cause too largea hole in the center of the original circle. Theshifting of… … FlG. 121. point in the center and without changing the radiusput the pen point in motion in the direction of thepart of the circumference to be shaded. The pres-sure upon the pen is gradually increased as it ap-proaches the heaviest part of the shade line andthen gradually diminished. Figs. 125 and…
Mechanical drawing · Machine design
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