Quotation from: The Notebooks of Leonardo Da Vinci

Written by: Leonardo da Vinci


If an opaque body, smaller than the light, casts two shadows and if
it is the same size or larger, casts but one, it follows that a
pyramidal body, of which part is smaller, part equal to, and part
larger than, the luminous body, will cast a bifurcate shadow.


[Footnote: Between lines 2 and 3 there are in the original two large
diagrams.]


_IV._

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