Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 196
I 1-^ :^^^ M … Fig. 256. The parts may be compared proportionately with the diameter of shaft;thus the thickness of the hub is about | the diameter of the shaft, this pro-portion is also used for the hubs of couplings ; the width of the arms fromf to full diameter ; the thickness half the width ; the thickness of…
