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Complexions, too, were replaceable, spectacles superseded an inefficient eye-lens, and imperceptible false diaphragms were thrust into the failing ear. So he went over our anatomies, until, at last, he had conjured up a weird thing of shreds and patches, a simulacrum, an artificial body of a man, with but a doubtful germ of living flesh lurking somewhere in his recesses.
These telescopes were all made with a convex object-glass and a concave eye-lens, and this type is spoken of as the Galilean telescope. Its defects are that it has no real focus where cross-wires can be placed, and that the field of view is very small. Kepler suggested the convex eye-lens in 1611, and Scheiner claimed to have used one in 1617. But it was Huyghens who really introduced them.
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