"He slipped away slowly, withdrawing from this world by small, imperceptible degrees, and in the end it was as if he were a drop of water evaporating in the sun, shrinking and shrinking until at last he wasn’t there anymore."

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Euler calculated the force of the wheels necessary to raise the water in a reservoir ... My mill was carried out geometrically and could not raise a drop of water fifty yards from the reservoir. Vanity of vanities! Vanity of geometry!

— Frederick The Great