Abstract
IN Wiedemann's Annalen for December last, Prof. H. Muraoka published an account of the rays which he found to be emitted by a fire-fly (described by him as a “Johanniskäfer”), and which resemble the rays which Dr. Dawson Turner has found to be emitted by glow-worms, in that they can pass (like Röntgen's rays and uranium rays) through aluminium. Can any reader of NATURE state what species of insect is known by this name? Muraoka describes them as on the average 13–15 mm. long; the largest being 20 mm. long. He says they have two (or in smaller insects three) rowTs of luminous spherules on the under side of its body, but that the whole body is photographically active. He used about 1000 insects at a time, with exposures of two to three days.
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THOMPSON, S. Fire-fly Light. Nature 56, 126 (1897). https://doi.org/10.1038/056126d0
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DOI: https://doi.org/10.1038/056126d0
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