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A writer in the Chicago Times says: "An astronomer told the writer yesterday that the experts in that science do not attempt nowadays to cover all the ground, but each confines himself to his chosen department of work. The field is too vast for one man to attempt to spread himself all over it. Prof. Pickering, for instance, the director of Harvard Observatory, is a great observer, and gives almost exclusive attention to his telescopic work, leaving the mathematics of the science entirely to his assistants, Messrs. Chandler and Rogers."

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