Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 21
Fig. 5. Fig. 6. same radius, describe an arc D. Draw through the point 0 a line just touchingthis last arc, and the line C D will be the parallel line required. Two lines in the same plane, not parallel to each other, will come togetherif extended sufficiently far. The inclination or intersection…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
