Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 181
and E-C, which are drawn directly fromA and C with the 30-60 degree triangle.With C as a center and C-E as a radiusdescribe the arc E-F. With J. as acenter and with C~E as a radius describethe arc G-B. With the intersectionpoint P of the lines A-B and C-E as a center and with P-E asa radius… … Fig. 125. — Approximate Methodof Drawing an Isometric of aCircle. 122. Isometric Drawing of a Plane Figure Composed ofStraight and CurvedLines. Assume that anyplane outline as shownin Fig. 126 (a) is to be
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-319-211.webp)
