“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.”
The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance
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Leonardo Da Vinci 363
Italian Renaissance polymath 1452–1519Related quotes

“A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.”
The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

Query 1
Opticks (1704)
Source: The Phantom Tollbooth

Source: Sir William Herschel: His Life and Works (1880), Ch.4 "Life and Works" from a memoir, published (1817).

“That body is heavier than another which, in an equal bulk, moves downward quicker.”
IV. 1. as quoted by Florian Cajori (1899)
On the Heavens

The Notebooks of Leonardo da Vinci (1883), III Six books on Light and Shade