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Updated: July 13, 2026
M. Leverrier showed me the transit instrument and the mural circle. He has, like Mr. Airy, made the transit instrument incapable of mechanical change for its corrections of error, so that it depends for accuracy upon its faults being known and corrected in the computations. "All the early observatories of Europe seem to have been built as temples to Urania, and not as working-chambers of science.
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