Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 109
tting will be the first trouble experienced by the beginner,and will tend to augment the inaccuracy of his lines; in trying tosecure sufficient space between the pen-point and the ruling-edgehe will assume a position, to begin with, other than in a perpen-dicular, and as the ruling proceeds and the… … DRAWING TOOLS AND MATERIALS. 91 Joint the direction of the line, keeping it, however, in a vertical planeparallel with the straight-edge. 89. The Compass.—Fig. 48. The compass—an instrumentfor drawing circles—is next to the ruling-pen in importance, andconsists of five pieces: (1) the com-pass…
Mechanical drawing
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