Telescope
Plate 7.3
Crooked timber
THE NATIONAL GEOGRAPHIC MAGAZINE ~ JUNE 1931
Goa at the time of Albuquerque
Years ago
Vasco da Gama
Leonardo da Vinci - illustraion for virtue and env…
Boutonniere
Colors
flowers
Plate 2.6
Plate 2.7
Man -- A chemical compound!
. . . . Walk. . . .
Spinoza
"Molyneux's Problem" / Shapes
Cork
The Astronomer
Photography / Photographer
Fig. 33
Perspective
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Here our eyes are [seen as] bows,
And shoot out rays: there it’s [deemed] a gross lie,
There it’s naught but mirror glass that takes things in.
In the third century BCE the Greek mathematician Euclid connected theories of vision to mathematics. In his ‘Optica,’ he defined the visual process in a purely geometrical way: rays proceed in straight lines from the eye, radiating outward to objects in the shape of cone. This cone, with its apex at the eye and its base at the object viewed, became known in the eleventy century as “the pyramid of vision” . . . .Page 76
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