Abstract
ALTENBURG in 1928 found that the fluorescence of certain salts was only very slightly, if at all, affected when Drosophila melanogaster were interposed between the discharge tube of a Cooper Hewitt lamp and the salts at which the rays were directed. From this he concluded that the ultra-violet rays penetrated the chitin rather freely. His conclusion has been accepted by subsequent workers. Altenburg did not state, however, which salts were used, how many layers of flies there were, or how closely they were arranged. Besides, the shortest wave-lengths of visible light also cause fluorescence of salts.
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ELOFF, G., BOSAZZA, V. Penetration of Ultra-Violet Rays through Chitin. Nature 141, 608 (1938). https://doi.org/10.1038/141608c0
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DOI: https://doi.org/10.1038/141608c0
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