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Start Over Authors McCook, Henry C. (Henry Christopher), 1837-1911, author ✖Remove constraint Authors: McCook, Henry C. (Henry Christopher), 1837-1911, author Titles Address delivered on the occasion of the opening of the new lecture hall of the Academy of Natural Sciences of Philadelphia, February 22, 1892 ✖Remove constraint Titles: Address delivered on the occasion of the opening of the new lecture hall of the Academy of Natural Sciences of Philadelphia, February 22, 1892

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  • McCook, Henry C. (Henry Christopher), 1837-1911, author1

  • Address delivered on the occasion of the opening of the new lecture hall of the Academy of Natural Sciences of Philadelphia, February 22, 18921