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 249
DKAWIXCr OF MACHINERY. 185 PROJECTIONS OF ECCENTRICS. Tlie term eccentric is applied in geneml to all such enrvos as arc com-posed of points situated at unequal distances from a central point or axis.The ellipse, the curve called the heart, and even the circle itself, whensupposed to be fixed upon…
