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III. Six Books on Light and Shade: 127.
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III. Six Books on Light and Shade: 127.
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III. Six Books on Light and Shade: 127.

127.

How there are 2 different kinds of light; one being called diffused, the other restricted. The diffused is that which freely illuminates objects. The restricted is that which being admitted through an opening or window illuminates them on that side only.

55

Footnotes
  1. 75:55

    : At the spot marked A in the first diagram Leonardo wrote lume costretto (restricted light). At the spot B on the second diagram he wrote lume libero (diffused light).

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