Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 319
\ l!/ / \ ; I / / \ i i / / A Fig. 672. every position of the point ^, be perpendicular or normal to the surfaces of con-tact at that point to both the curves m m and n n/a particular property of thatcurve known as the cycloid. When one wheel conducts the other, it is called the driver or leader,…
Mechanical drawing
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