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fever, contracted under, and fed upon, dis-
                                         appointment and exhaustion. Those were
                                         not the days when men could adopt as a
                                         profession the ”research of endowment.”
                                            Before taking leave of Kepler, who was
                                         by no means a man of one idea, it ought
                                         to be here recorded that he was the first
                                         to suggest that a telescope made with both
                                         lenses convex (not a Galilean telescope) can
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