The American house-carpenter; a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 45
then gf will be nearly the length of the semi-circle, a d c ; and twice g f will nearly equal the circumferenceof the circle, a b c d, as was required. Lines drawn from e, through any points in the circle, as o, oand o, to ^?, p and p, will divide gfin the same way as the semi-circle, a d c, is… … Fig. 53. 92, a.—Another method. Let a bf c, (Fig. 53,) be the givencircle. Draw the diameter, a c ; from d, the centre, and at rightangles to a c, draw d b ; join b and c ; bisect be at e; from d,through e, draw df; then ef added to three times the diameter, PRACTICAL GEOMETRY. Jj9 will equal the…
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-162-91.webp)
