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 238
the teeth; their outline is formed by a circledrawn from the centre C, with a radius a little less than the distance fromthis point to the straight line, bounding the upper surface of the teeth oftlie rack. SYSTEM COMPOSED OF A KACK DRIVING A PINION. In this case the construction is in all respects… … L!i:i£ai^ 9iia®^ r PLATE X X I y . 183 Fi- 1
