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[Footnote: 9. 32. in margine: lines 34-61 are, in the original,
written on the margin and above them is the diagram to which
Leonardo seems to refer here.]
8
70.
PERSPECTIVE.
Among objects moved from the eye at equal distance, that undergoes
least diminution which at first was most remote.
When various objects are removed at equal distances farther from
their original position, that which was at first the farthest from
the eye will diminish least. And the proportion of the diminution
will be in proportion to the relative distance of the objects from
the eye before they were removed.
That is to say in the object t and the object e the proportion
of their distances from the eye a is quintuple. I remove each from
its place and set it farther from the eye by one of the 5 parts into
which the proposition is divided. Hence it happens that the nearest
to the eye has doubled the distance and according to the last
proposition but one of this, is diminished by the half of its whole
size; and the body e, by the same motion, is diminished 1/5 of its
whole size. Therefore, by that same last proposition but one, that
which is said in this last proposition is true; and this I say of
711
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