Mechanical drawing: lettering, materials and methods (1916)
Kepler, Frank R. [from old catalog] · Detroit, Mich., Pub. under authority of the Board of education · leaf 20
he line be revolved through one-eighth of acomplete revolution to the position od, it has been revolved through45/360 of a revolution, or 45°, and an angle of 45 degrees isformed. DRAWING INSTRUMENTS 17 In Fig. 8, if the line oe be revolved through one-sixth of arevolution, it has been revolved… … Figure 5 Figure 7
Lettering · Mechanical drawing
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