Sacred Texts Age of Reason Index
III. Six Books on Light and Shade Index
Previous Next
Buy this Book at Amazon.com
The Da Vinci Notebooks at sacred-texts.com
As regards all visible objects 3 things must be considered. These are the position of the eye which sees: that of the object seen [with regard] to the light, and the position of the light which illuminates the object, b is the eye, a the object seen, c the light, a is the eye, b the illuminating body, c is the illuminated object.
