Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 839
828 GEERINCt. … It may also be observed, lhal for every pair of pitch circles an infinite number of pairs of involutesmay bo assigned that will answer the. required conditions; for the inclination of ETD to the line ofcentres is manifestly arbitrary, and every change of inclination mani- 0941. festly produces a…
Mechanical engineering
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