Leonardo, da Vinci, 1452-1519 · London : Printed for I. and J. Taylor, at the Architectural Library ... · leaf 123
Now, if, for inftance, yourlirft object be a tree, place a glafs ovcr-againfkit, and holding your eyes fteadily in the famepofition, defign your tree upon the glafs; trac-ing out the contour from the image before youreye: having done this, retire backwards tillfuch time as the natural tree appears… … BY LEONARDO DA VINCI. 9^ length it be brought to refemble the naturaltree, both in form and colour; infomuch that,by fhutting one eye, they may appear bothpainted alike, and both equally diftant. Con-tinue the fame courfe, with regard to the otherobjecfts, at the fecond and third diftance ;…
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