Astronography, or, Astronomical geography, with the use of globes : arranged either for simultaneous reading and study in classes, or for study in the common method (1854)
SEKTEKS POSITIONS. 6. Since the Movable Positions depend on the locationof the First Observer, and since any point on the Earthssurface may be taken as his place, therefore all the ap-paratus of imaginary circles, lines, and points made in thescience to accommodate mans limited view, are Movable… … Zcwer Vertex NADIR 7. That place on the Earth on which the First Observerstands, and which we have called the Upper Vertex(see Fig. 8), has been incorrectly regarded as the Zenith;but it is a point on the Terrestrial Sphere; and the Zenithis its corresponding point in the Heavens, and belongssolely…
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-338-91.webp)
