The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 60
Fig. 79j) parallel to a c, be the direction of the cutting plane.From m, draw m d, at right angles to a 6 ; then I m will be theaxis and height, and m d an ordinate and half the base; as atFig. 92, 93. 114.— To find the height^ base and transverse axis of anhyperbola. Let o r, [Fig. 79,) be the… … Fig. 80. 115.— The axes being given, to find the foci, and to describe an ellipsis with a string. Let a b, [Fig. 80,) and c d, be the given axes. Upon c, with a e orb e for radius, describe the arc, ff; then/and/, the points at which the arc cuts the transverse axis, will be the foci. At/ and…
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-319-211.webp)
