Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 21
rary, i. e., they do not actually represent fixeddirections in space, but are simply relative expressions, thus, whatis east to one observer, maybe west to another, for example, takethe next diagram, representing the earth as round, the north polebeing at the position N, and suppose two observers… … being at his right hand. The terms therefore, north, south, eastand west, are only relative expressions, and not absolute direc-tions. It will be necessary to remember this, and we may alsoremark, the same is true of the expressions up, and down. Whatwould be up to an observer at A, would be in the…
Astronomy · Meteorology · Geology · Paleontology
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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-170-70.webp)
