Abstract
PROF. KOLHÖRSTER has kindly directed my attention to a possible misunderstanding of the statement “a hitherto unknown component” in my communication entitled “A New Hard Component of the Cosmic Ultra-Radiation”1. This statement, which referred to the harder Kiirunavaara component, was not intended in any way to dispute Kolhörster's earlier discovery of a very hard radiation capable of penetrating more than 500 m. of water. I had, however, overlooked that Kolhörster has also mentioned2 a small decrease of the ionisation even down to 700 m. of water found by him so early as 1928 in the Stassfurt mines; it is evident that the whole radiation found by him should not be identified with the softer Kiirunavaara component alone.
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NATURE, 133, 63, Jan. 13, 1934.
Berlin Ber., No. 23, July 19, 1933.
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CORLIN, A. A New Hard Component of the Cosmic Ultra-Radiation. Nature 133, 419 (1934). https://doi.org/10.1038/133419c0
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DOI: https://doi.org/10.1038/133419c0
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