Comments on use of muriate of lime on plants. Also on existence of unexplained bands on film and on presence of red light beyond normal spectrum with light originating from certain sources.
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Comments on use of muriate of lime on plants. Also on existence of unexplained bands on film and on presence of red light beyond normal spectrum with light originating from certain sources.
Asks JH about Dr. Balfour's account in Asiatic Researches about lunar effects on humans in India.
Comments on Josef Fraunhofer's work on double stars, on quality and color of light from different sources, refraction of different kinds of light, and solution of a problem in conic sections. Is going to Geneva and Modena soon.
Describes observations made as he travelled and people visited on journey from London to Ancona.
Talks about Josef Fraunhofer's failing health and his making of flint glass.
Is sending on two items directed to JH through WT.
Questions and comments regarding improvements in microscopy.
Comments on several experiments with spectra passing through glass films.