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Equatorial longitude effects on cosmic rays

Millikan, Robert A. and Neher, H. Victor (1935) Equatorial longitude effects on cosmic rays. Proceedings of the National Academy of Sciences of the United States of America, 21 (6). pp. 313-315. ISSN 0027-8424.

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At the meeting of the National Academy just a year ago Dr. Neher and I presented our evidence for a previously unsuspected effect in cosmic rays which we termed the "longitude effect." This effect had been brought to light by the sending of vibration-free self-recording electroscopes on a number of voyages from Los Angeles to Mollendo, Peru, and back, and at the same time on a Dollar Line trip around the world. The very accurate records obtained on these voyages, when studied carefully in the laboratory in January 1934, brought to light the fact that in going from the north temperate zone into the equatorial belt the decrease in the sea level cosmic ray intensity is only 8 per cent between San Francisco and Mollendo while it is 12 per cent when the passage from the temperate zone into the equatorial belt takes place on the other side of the world, that is, in the region of Singapore and Batavia.

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Additional Information:© 1935 by the National Academy of Sciences. Read before the Academy, Tuesday, April 23, 1935. These two surveys, one at sea level and one at high altitude, are being supported by grants from the Carnegie Corporation of New York administered by the Carnegie Institution of Washington, to which institutions we desire to express our thanks for this assistance.
Issue or Number:6
Record Number:CaltechAUTHORS:MILpnas35
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7629
Deposited By: Tony Diaz
Deposited On:15 Mar 2007
Last Modified:02 Oct 2019 23:43

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