243

objects.

OF LIGHT.

A luminous body when obscured by a dense atmosphere will appear smaller; as may be seen by the moon or sun veiled by mists.

OF LIGHT.

Of several luminous bodies of equal size and brilliancy and at an equal distance, that will look the largest which is surrounded by the darkest background.

OF LIGHT.

I find that any luminous body when seen through a dense and thick mist diminishes in proportion to its distance from the eye. Thus it is with the sun by day, as well as the moon and the other eternal lights by night. And when the air is clear, these luminaries appear larger in proportion as they are farther from the eye.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

III * V
Notebooks of Leonoardo da Vinci
IV: Perspective of Disappearance.
. . .
223
An illustration by experiment.
224
A guiding rule.
225
An experiment.
226
On indistinctness at short distances.
227,
228,
229,
230,
231
On indistinctness at great distances.
232,
233,
234
disappearance.
235,
236,
237,
238,
239
objects.
240,
241,
242,
243,
244,
245,
246,
247,
248,
249
Propositions on perspective of disappearance from MS. C..
250,
251,
252,
253,
254,
255,
256,
257,
258,
259,
260,
261,
262
. . .