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 562
or different. •^°* ^^- X I If they lie on the same side of the common tangent and have dif-ferent radii, they forma compound curve, ABD. When the radii ofcurvature are known,the determination ofthe centres is ob-tained easily, by de-scribing arcs with the established radii from the tangent points.… … 364 TOPOGRAPHICAL DRAWING. place at B, then at A erect a perpendicular to the given line, findsome point on this perpendicular which is equally distant from A and B,and this point will be the centre of the curve A B; through this pointand B draw an indefinite line, its intersection by the…
