The Scientific American reference book; a compendium of useful information for inventors and mechanics, containing the complete patent laws of the United States ... forms for patents, caveats, assignments, licenses, and shop rights ... etc., etc (1876)
New York, Munn · leaf 89
be the radius of i Problem 3.—^To find the diameterof a circle that shall be any numberof times the area of a given circle:Let A B C D be the given circle;draw the two diameters A B and C Dat right angles to each other, and thecord A D will be the radius of thecircle o P, twice the area of the… … Problem 4.—To describean ellipsis, the transverseand conjugate diameters be-ing given: From o, ascentre, with the differenceof the transverse and con-jugate semi-diameters, setoff* o c and o d ; draw the diagonal c c?, and continue the line o c to A:, by the addition of half the diagonal c…
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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-76-54.webp)
