Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 48
Fig. 54. Fig. 55. Firg.b* 55! To Draw a Tangent between two Cir-cles.—-Join the centers A and B. Draw any radial linefrom A as A2 and make 1-2 = the radius of circle B. FromA with radius A-2 describe a circle C2D. From center B 34 MECHANICAL DRAWING. draw tangents BC and BD to circle C2D at the…
![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-187-103.webp)
