The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 69
lipsis with a tangent given, to detect the pointof contact. L,etagbf, (Fig. 89,) be the given ellipsis and tan-gent. Through the centre., e, draw a b, parallel to the tangent;any where between e and/, draw c d, parallel to a b ; bisect c d ino ; through o and e, draw f g ; then g will be the point… … fig. 90. 125.—Any diameter and its conjugate being given, tc as-certain the two axes, and thence to describe the ellipsis. i_<eta b and c d, (Fig. 90,) be the given diameters, conjugate to oneanother. Through c, draw ef, parallel to a b ; from c, draw cg, at right angles to ef; make c g equal to…
Carpentry · Architecture
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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-317-209.webp)
