Imitative art;, or, The means of representing the pictorial appearances of objects, as governed by aerial and linear perspective: : being a manual of details, for the amateur sketcher and the man of business, with a chapter on finish. (1840)
Howard, Frank, 1805-1866, Darton & Clark, publisher, J. Green and Co., printer · London : Darton and Clark, Holborn Hill. · leaf 49
35 LIGHTS AND SHADOWS. which the corner is presented to the spectator, receive light more strongly than any others, and particularly so when inclined, as the side of a cone or of a pyramid presenting an angle to the light and to the spectator of the same degree. They recede le^ either from the eye… … half- tint or shadow.
Drawing · Perspective · Shades and shadows · Surfaces · Drapery in art · Projection
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![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-123-42.webp)
