Snow, Benjamin Warner, 1860- · Madison, Wis. · leaf 54
iiu. 31. The entire circumfer-ence of a circle subteiid.s anangle of 2 ?r radians. •0 that or TT r^ 8.141592 TT d. 2 TT r, Avhere c is the circumference, d the diametei-, and /• the radiusof the circle. By a comparison of this expression for the length of the cir--cumference with the above general…
Physics
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![An illustration from Cosmographia in qvatvor libros distribvta summo ordine, miraqve facilitate, ac breuitate ad magnam Ptolemæi mathematicam constructionem, ad vniuersamque astrologiam institutens. Francisco Barocio ... avtore. Cum præfatione eiusdem autoris, in qua perfecta quidem astrologiæ diuisio, & enarratio autorum illustrium, & voluminum ab eis conscriptorum in singulis astrologiæ partibus habetur: Joannis de Sacrobosco verò 84 errores, et alij permulti suorum expositorum, & sectatorum ostenduntur. rationibusq[uam] redarguuntur. Præcesserunt etiam quædam communia mathematica, necnon arithmetica, & geometrica principia, nonnullæq[uam] propositiones, de quibus in toto opere sæpe fit mentio: ac demum locupletissimus index eorum, quæ ipsa Cosmographia continentur .. (1585)](https://img.insideoutlibrary.com/img/200/ia-cosmographiainqv00baro-96-13.webp)
