Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 88
erring the chordsof the arcs by means of the compass, lines are drawnthrough the points in the circumference and parallelwith the director. Where these lines intersect thearcs representing the generating circle drawn fromthe dividing points in the director, points will befound through which to draw… … Fy&. 3 O.
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
