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of the planets, and especially of the planet
                                         Mars, for it was by an examination of these
                                         results that Kepler was led to the discovery
                                         of his immortal laws.
                                            After the death of King Frederick the
                                         observatories of Tycho Brahe were not sup-
                                         ported. The gigantic power and industry
                                         displayed by this determined man were ac-
                                         companied, as often happens, by an over-
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