Abstract
In recent publications, Forbush and Hess [see 1 of “References” at end of paper] and their collaborators have described the fluctuations in intensity of the cosmic radiation observed during the magnetic storm of March 1,1942, and have pointed out the existence of two large changes, representing increases of intensity, of short duration, which took place at 14h GMT, February 28, and at 06h GMT, March 7, 1942. Duperier [2] has also published a curve showing the main trend of the cosmic‐ray intensity. A meter of the Millikan‐Neher electroscope‐type was in operation at the home of Professor Hilberry at Irvington, New York, during this storm, and its records had been examined for the effect of the magnetic storm. The large changes reported by Forbush and Hess were observed on this record.
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