Berry, Arthur,b. 1862 · London, J. Murray · leaf 130
the primum mobile, which movedall the others ; another sphere was added by Tabit benKorra to account for trepidation (§ 58), and accepted byAlfonso and his school; an eleventh sphere was addedtowards the end of the Middle Ages to account for the 68] The Celestial Spheres supposed changes in the… … Fig. 36.—The celestial spheres. From Apians Cosmographia. These spheres, which were almost entirely fanciful andin no serious way even professed to account for the detailsof the celestial motions, are of course quite different fromthe circles known as deferents and epicycles, which Hippar-chus and…
Astronomy
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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-395-106.webp)
