Das Buch von der Malerei nach dem Codex Vaticanus (Urbinas) 1270 (1882)
Leonardo, da Vinci, 1452-1519, Ludwig, Heinrich, 1829-1897 · Wien : W. Braumüller · leaf 46
riete d e sia quella, che ricceue Y ombra deriuatiua nella parte m n m, et il suo rimanente, d n et m e, resta alluminato dal a. e’ 1 lume d n reflette nell’ ombra primitiua b c, et il simile fä il lume m e. adonque, la deriuatiua n m, non uedendo il lume a, resta oscura, et la primitiua s’ alumina… … ^ lume ef deriuatiuo ui uede per razzi reflessi; e 1’ ombra deriuatiua fg non ui aggiongie, perch fbd
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