RECENT correspondence (NATURE, April 5 and June 14) on the connexion between the potential gradient and the degree of pollution of the atmosphere prompts me to put forward a suggestion to explain the ...
IN NATURE of December 12, 1912 (p. 411), Dr. George C. Simpson directs attention to several outstanding problems in atmospheric electricity. He says, inter alia: “Everywhere it has been found that the ...
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