An Apparatus for Recording the Ultra-Violet Light of the Sky

Abstract

OBSERVATIONS of ultra-violet light are being made in many towns and seaside resorts by means of Sir Leonard Hill's method of recording the fading of a solution of methylene blue in acetone. For simplicity it would be difficult to improve upon this procedure, but in winter, when the days are short, there are many times when the fading is too small to be observable by this method.

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ASHWORTH, J. An Apparatus for Recording the Ultra-Violet Light of the Sky. Nature 127, 893 (1931). https://doi.org/10.1038/127893a0

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