Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 55
hepossibility of the existence simultaneouslyof the two antagonistic lights in the atmos-phere gives a probable explanation of thoseanomalies that so often torment photogra-phers. It is in those instances in which itis impossible to obtain an image—howeverlong may be the exposition in the camera… … Often we can obtain the effect no morein 120 than in 30 seconds, wherefore it ispossible that the first effect may be destroy-ed by a continuance of exposure, so thatwhich was inevitable takes place, duringthe exposure, or the solar light is suddenlyrendered yellow by the clouds of vapor.In case…
Photography · Art and photography
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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-234-80.webp)
