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Updated: May 13, 2025
In this class we find especially scientists and thinkers Tycho-Brahé, who for twenty-one years scarcely left his observatory; Leibniz, who could remain for three days almost motionless in an armchair. But most methods are too artificial or too strong not to become quickly noxious.
The Duc d'Epernon fainted at the sight of a hare, Tycho-Brahe at that of a fox, Henri III. at the presence of a cat, the Marechal d'Albret at the sight of a wild hog; these antipathies were produced by animal emanations, and often took effect at a great distance. The Chevalier de Guise, Marie de Medici, and many other persons have felt faint at seeing a rose even in a painting.
On the other hand, there are guesses that have met success without much delay, but in which the imaginative phase that of the invention preceding all demonstration is easy to locate. We know that Tycho-Brahé, lacking inventive genius but rich in capacity for exact observation, met Kepler, an adventurous spirit: together, the two made a complete scientist.
Another example: the machine for measuring duration is at first a simple clepsydra; then there are added marks indicating the subdivisions of time, then a water gauge causes a hand to move around a dial, then two hands for the hours and minutes; then comes a great moment by the use of weights the clepsydra becomes a clock, at first massive and cumbersome, later lightened, becoming capable, with Tycho-Brahé, of marking seconds; and then another moment Huyghens invents the spiral spring to replace the weights, and the clock, simplified and lightened, becomes the watch.
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