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 92
erior angle c T F by the lineT d. Tliis line T c? is the tangent required. Piion. LX.—To draw a tangent to an ellipse from a given point lolth-oat the curre (iig. 162). Ki-oiii \hv given point T as centre, with a radius equal to its distancefi-oni \]\o, iKar(>st locus F, describe an arc; from… … Pkob. LXI.—To describe an ellipse approximately^ hy means of circular arcs. First, with arcs of two radii (fig. 163). Take tlie difference of the trans-verse and conjugate axes, and set it off from the centre O to <^ and (?, onO A and O C ; draw a c^ and set off half a do d; draw d i parallel to…
