Emerson, William, 1701-1782 · London : Printed for J. Nourse · leaf 184
GB, and Cgb jthen B^ will meafure the given arch G^; or Ggwill contain the given number of degrees fet fromB to b. So that either being given finds the other. P R O P. X. Prob.^0 meafure any part of a right circle. Rule. $: In the right circle ED, let EA zz AD j andlet AB be to be mcafured. Make CF… … R l,p,S.
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-86-62.webp)
