Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 33
Problem 45. proximate ellipse. … To draw up07i given axes, AB and CD, an ap- With the centre, 6, of the ellipse ascentre and half the short axis, <5 C, asradius describe an arc C i. Draw CB andfrom C set off C2 equal to B i, or thedifference between half the short and halfthe long axis. Bisect B 2 and continuethe bisecting line…
Mechanical drawing
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![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-186-102.webp)
![An illustration from A Dictionary of science, literature, and art [electronic resource]: comprising the history, description, and scientific principles of every branch of human knowledge; with the derivation and definition of all the terms in general use (1844)](https://img.insideoutlibrary.com/img/200/ia-62523189.5956.emory.edu-1278-364.webp)
