Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 91
centrally overit, 4 above the ground. The cone rests on the ground. A frustum of a square pyramid, whose bases are 5 and3 respectively, and whose height is 4, supports a cone placedcentrally upon it: the diameter of the cone is 3 and its height3. The edge of the base touches the P.P. 2 to right. 88… … THE SPHERE. 89 is to be represented, an apparent fallacy appears, owing tothe representation of the circle that shows the section of thesphere. A sphere must always be supposed to be drawn withthe radius of the circle as distance. However, as the per-spective of the circle, viewed in any oblique…
Geometrical drawing · Perspective
Internet Archive · Western University Libraries · 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-69-47.webp)
