. The Bell System technical journal . ring the 1932 eclipse from their own data.* The data from which our conclusions were drawn are shown inFig. 1. * Presented before joint meeting of I. R. E and U. R. S. I., Washington, D. C,April 26, 1935. Published in same brief form in November, 1935 /. R. E. Proceed-ings as in this Journal. » Letter to Nature, vol. 135, p, 393; March 9, 1935. * Mention has already been made of the results of our 1932 eclipse experimentsin the following publications: Science. November 11, 1932; Proc. Fifth Pacific Science Congress, vol. 3, , 1934; Nature, Sept


. The Bell System technical journal . ring the 1932 eclipse from their own data.* The data from which our conclusions were drawn are shown inFig. 1. * Presented before joint meeting of I. R. E and U. R. S. I., Washington, D. C,April 26, 1935. Published in same brief form in November, 1935 /. R. E. Proceed-ings as in this Journal. » Letter to Nature, vol. 135, p, 393; March 9, 1935. * Mention has already been made of the results of our 1932 eclipse experimentsin the following publications: Science. November 11, 1932; Proc. Fifth Pacific Science Congress, vol. 3, , 1934; Nature, September 30, 1933; Bell Lab. Record, March, 1935. The data have never been published and we are therefore including some of itin this paper as it may be of interest to other investigators in this field. * M refers to the intermediate region between E and Fi. Kirby, Berkner, Gilliland, and Norton. Proc. I. , vol. 22, pp. 2-16-265,February, 1934; Henderson, Canadian Jour. Res., January, 1933. 162 ECLIPSE EFFECTS IN THE IONOSPHERE 163. 200 r I A /o y^d ^^y ^ ^—•■^-^ 1 200


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