Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 11
work, and to that only. In the case illustrated here,these pins, by indefinite increase in number and dimi-nution in size, will finally become points in the cir-cumferences of circles which roll in contact. Theseaxes are perpendicular to each other, but turned pinsmay be inserted in other surfaces…
Mechanical engineering -- Dictionaries
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