The Solar Constant and Terrestrial Magnetism

Abstract

DR. CHREE has obligingly sent me a copy of his paper entitled “The Relationship between the Solar Constant and Terrestrial Magnetism” (Proc. Roy. Soc. A 109, 1925). He finds no indication in the solar constant data of 1918–1924 of a repetition of departures after a solar rotation period. This finding is quite in accord with ours. We have, indeed, noted the solar rotation period very plainly in some of the data, but only for a few months at a time, as in the year 1915. (See C. G. Abbot, “On Periodicity in Solar Variation”, Smithsonian Miscellaneous Collections, vol. 69, No. 6, 1918.)