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- posted: December 18 @ 6:04am
"Not only does light fly from the sun with a velocity a million and a half times greater than that of a cannon-ball, but it darts from every reflecting surface with like velocity, and reaches the tender structure of the eye so gently, that, as it falls upon the little web of nerves there spread to receive it, it imparts the most pleasing sensations. Philosophers once tried to weigh the sunbeam. They constructed a most delicate balance, and suddenly let in upon it a beam of light - the lever of the balance being so delicately hung that the fluttering of a fly would have disturbed it. Everything being prepared, they took their places and keenly watched the result. The sunbeam that was to decide the experiment had flown 95,000,000 of miles in eight minutes, and shot upon the balance with unabated velocity. But the balance moved not, and the philosophers were mute." - Marcus Aurelius Root, The Camera and the Pencil, 1864







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