Societies and Academies

    Abstract

    LONDON

    Royal Society, Jan. 20.-Certain cases of electromotive force sustained by the action of electrolytes on electrolytes, by J. Hopkinsoii. Communicated by Sir W. ThomsonOn reversed photographs of the solar spectrum beyond the red, obtained on a collodion plate, in a letter to Prof. Stokes, by Capt. J. Waterhouse, Assistant Surveyor-General of India. Communicated by Prof. Stokes.

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