Appletons' cyclopædia of technical drawing : embracing the principles of construction as applied to practical design ... (1896)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton · leaf 317
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, and theother the driven or follower. The…
Mechanical drawing
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