A treatise of painting . remaining, being thofe, which are found be-tween the interruptions of the laid Rays of „ By how much the Air is nearer the Earth, feen in1! Miftor Water, by fo much it is the more grofs-,or thick Air. this follows from a Propofition which 1 have clfewhere demonitrated, that a heavy Bodyraifes it felf lefs, than a light one ^ whence, bythe Rule of Contraries, it follows, that a lightBody raifes it felf higher than a light \c t> -U- - That Part of a Buildine., which is found in the Ot Buildings _ _ . .... , ? o% n _ ,-. , -,< feen through grofTe
A treatise of painting . remaining, being thofe, which are found be-tween the interruptions of the laid Rays of „ By how much the Air is nearer the Earth, feen in1! Miftor Water, by fo much it is the more grofs-,or thick Air. this follows from a Propofition which 1 have clfewhere demonitrated, that a heavy Bodyraifes it felf lefs, than a light one ^ whence, bythe Rule of Contraries, it follows, that a lightBody raifes it felf higher than a light \c t> -U- - That Part of a Buildine., which is found in the Ot Buildings _ _ . .... , ? o% n _ ,-. , -,< feen through grofTeft Air, wdl be the leafr fenfible, and willaGrof* Airv (how it felf the leaft j and on the contrary, thatPart found in the purell Air, will appear themofl vilible and diltinct: Thus, if you fuppofethe Eye N, looking at the Tower A D, everyPart will be feen the more confufedly, in pro-portion as it approaches nearer the Earth •, andmore clearly and diitmclly, as it is further re-moved from it. Every t/j$. *By Leonardo da Vinci. 159 Every obfcureOb)ect, will appear fo much the°f Obj«a$more Clear, and Bright, as it is further removed ^en at a Di~from the Eye •, of courfe, therefore, the fameObjeflt will appear fo much the more oblcure, asit is fecn at a lefs Diftance : Hence it follows,that the lower Parts of an Objeft, feen in a thickAir, will feem further removed, than its Top}fo that the bottom of a Mountain, will in ap-pearance be further Diftant from the Eye, thanits Summet •, and yet in Reality it is the neareft. The Eye viewing a City invelloped in aHow * Cit?Grofs Air, will find die Tops of the Buiidings,^^.^ *obfeurer, and, withal, more diftinct, than theParts beneath •, for the latter will be feen on aWhiter Ground than the former ; inafmuch asthey are found in an Air, that is lower andmore Grofs. The lower Bounds and Extremities of fardi-of thc lowefftant Obje&s, will be lefs vifible than the upper : lounds\ or -r>i • • \ r 11 • n/r ^ • 1
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Keywords: ., bookauthorleonardodavinci14521519, bookdeca, booksubjectpainting
