Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 294
ouslythe case with a ring, an empty box, and, in general, any hollow vessel. Ccntrobaryc theorem, or Method of Guldinus. These centres of gravity of lines or surfaces (which canbe found approximately by experiments on thin wires or plates) afford an easy means of solving certainuseful problems in… … lar its outline, may have both its solidity and its superflcial contents found by the following very simplemethods. Let 847 be the solid, and ABDE its half sections, or thatplane figure which, in revolving round the line AE as an axis, wouldrequire a space equal and similar to the solid—or, as it…
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-332-223.webp)
