Smithsonian miscellaneous collections . (i<- 7 YR. —H Fig. 12.—23- and 46-year periodicities in St. Petersburgtemperatures. IS i6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122. 8 j n 8 8 S g 1VWW0N iN33*3d no. 4 SOLAR VARIATION, WEATHER ELEMENT—ABBOT 17 Predetermined by Solar Variation, reference No. 18 above. It showshow the features of precipitation at Peoria, 111., tend to repeat them-selves at intervals of slightly less than 23 years. tlO + 8 + 6 I- + 2 $ 0 a o z o zuj -g A 1 / \r T T T II 13 YEARS 15 19 23 Fig. 13A.—Mean 22§-year cycle in Southern New England precipitation. 1750to 193
Smithsonian miscellaneous collections . (i<- 7 YR. —H Fig. 12.—23- and 46-year periodicities in St. Petersburgtemperatures. IS i6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122. 8 j n 8 8 S g 1VWW0N iN33*3d no. 4 SOLAR VARIATION, WEATHER ELEMENT—ABBOT 17 Predetermined by Solar Variation, reference No. 18 above. It showshow the features of precipitation at Peoria, 111., tend to repeat them-selves at intervals of slightly less than 23 years. tlO + 8 + 6 I- + 2 $ 0 a o z o zuj -g A 1 / \r T T T II 13 YEARS 15 19 23 Fig. 13A.—Mean 22§-year cycle in Southern New England precipitation. 1750to 1931. Mean of 8 cycles. g. I reproduce here as figure 13A, figure 1 of my paper RainfallVariations, reference No. 5 Many other harmonious phenomena might be brought forward, butsufficient has been shown to support the working hypothesis of a 22f-year period in solar variation. 3 The New England drought of 1952 falls in timely with this curve. 15 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122 PROPOSITION III Integral snbmaltiples of 22\ years are regular periodicities insolar variation I shall show that (a) at least 23 such periods were found by tabu-lating solar-c
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