Abstract
DURING the last two years we have been using photographic plates (Ilford R2 and New Halftone) for the study of cosmic rays at different altitudes. Both treated and untreated plates have been used for the purpose. In the present communication is reported the results obtained by keeping for five months untreated New Halftone plates in cardboard containers, vertically on their long sides, at Darjeeling (Mayapuri Research Station, elevation 2,130 m.) and at Sandakphu (Dak Bungalow, elevation 3,660 m.).
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References
Blau and Wambacher, Wien Akad., Abt. II A, 146, 469, 623 (1937).
Bothe, Rev. Mod. Phys., 11, 282 (1939).
Wentzel, Phys. Rev., 54, 869 (1938).
Heisenberg, Z. Phys., 113, 61 (1939).
Swann and Danforth, J. Franklin Inst., 48 (1939).
Maier Leibnitz, Z. Phys., 112, 569 (1939).
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BOSE, D., CHOWDHRY, B. Photographic Plates as Detectors of Mesotron Showers. Nature 145, 894–895 (1940). https://doi.org/10.1038/145894a0
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DOI: https://doi.org/10.1038/145894a0
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