Quotation from: The Notebooks of Leonardo Da Vinci

Written by: Leonardo da Vinci


[Footnote: For the easier understanding of the diagram and of its
connection with the preceding I may here remark that the square
plane shown above in profile by the line _c s_ is here indicated by
_e d o p_. According to lines 1, 3 _a b_ must be imagined as a plane
of glass placed perpendicularly at _o p_.]


57.


How to measure the pyramid of vision.

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