Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 262
;what is the convex surface of it ?Square root of half the sum of thesquares of the diameters, as byprevious examples, 12.1655.Then 14 : 12.1655 : : 4 : 3.4758 =height of segment, proportion-ate to the mean of the diameters.10x3.1416x3.4758 == 109.1957 ins. = remaining diameter X3.1416, and again…
Engineering · Mechanical engineering
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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-59-35.webp)
