A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 117
intersecting QQ in F. FromB sef off BP equal to DF, and join PF. Bisect FP andthrough the point of bisection draw a line cutting QQ inQ. Join QP and produce it indefinitely, and with Q ascentre and QD as radius describe an arc meeting QP pro-duced in H. Make OQ equal to OQ, and join QP andproduce… … Fig. I :2. arc to meet the arcs DH and CH in H and H, and to complete the egg-shaped oval. ELLIPSE.
Metal-work
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
