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    • Societies and Academies - Nature

      Nature· 4 days ago

      If placed parallel to the boundary between the two substances the refractive indices of which are to be compared by the Becke method, it gives better results than an iris diaphragm. In the case ...

    • Societies and Academies - Nature

      Nature· 4 days ago

      EDINBURGH Mineralogical Society, June 24.—This meeting was held at the Museum of Science and Art, Edinburgh.—Prof. Jas. Geikie, F. R. S., in the chair.—The following papers were read:—On forms ...