Smithsonian miscellaneous collections . 8 299 104 125 cycle day if the cycle is illusory. I infer that the cycle of still stands, but the phases of it are shifted to 2 days earlier thanin former years. Under that interpretation, the precipitation for cycledays I, II, III, X, XI, XIII, XV, XVI, XX, XIV, XV, XVI, XVII, if substituted for the preferred, would be found to yield theresults in table 3 for the year 1952, in which 8 of the 12 months arefavorable, and the years ratio, , becomes normal. I do not know what caused this apparent shift of phases. Possiblythe haziness of the
Smithsonian miscellaneous collections . 8 299 104 125 cycle day if the cycle is illusory. I infer that the cycle of still stands, but the phases of it are shifted to 2 days earlier thanin former years. Under that interpretation, the precipitation for cycledays I, II, III, X, XI, XIII, XV, XVI, XX, XIV, XV, XVI, XVII, if substituted for the preferred, would be found to yield theresults in table 3 for the year 1952, in which 8 of the 12 months arefavorable, and the years ratio, , becomes normal. I do not know what caused this apparent shift of phases. Possiblythe haziness of the atmosphere has been altered by the intensiveartillery and heavy bombing actions of the Korean war, and by thetests here and in Russia and Britain of atomic bombs. It is altogetheruncertain whether this change of phases will persist in 1953. Accord-ingly I give in table 2 the preferred days of the cycles as heretofore,and in addition, designated by italic type, the dates which should be NO. 13 WASHINGTON PRECIPITATION, TEMPERATURE ABBOT. Fig. I.—Frequency of precipitation on days of , Average, 1924 to 1941. B, Average, 1952. 4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 121 Table 2.—Predicted dates when average daily precipitation at Washington should exceed that on other dates for the year 1953 Preferred*cycle places Jan. Feb. Mar. Apr. May June 1 22 18 17 13 10 6 II 23 19 18 14 II 7 III 24 20 19 15 12 8 IVt 25 21 20 16 13 9 V 26 22 21 17 14 10 X 4,31 27 26 22 19 * 15 XI 5 28,1 27 23 20 16 XII 6 2 1,28 24 21 17 XIII 7 3 2,29 25 22 18 XV 9 5 431 27 24 20 XVI 10 6 5 1,28 25 21 XVII II 7 6 2,29 26 22 XVIII 12 8 7 3,30 27 23 XX 14 10 9 5 2,29 25 XXII 16 12 II 7 4,31 27 XXIV 18 14 13 9 6 2,29 XXV 19 15 14 10 7 3,30 XVI 20 16 15 II 8 4 XVII 21 17 16 12 9 5 Preferred*cycle places July Aug. Sept. Oct. Nov. Dec. 1 3,30 26 22 19 15 12 II 4,31 27 23 20 16 13 III 5 1,28 24 21 17 14 IVf 6 2,29 25 22 18 15 V 7 3,30 26 23 19 16 X 12 8 4 1,28 24 21 XI 13 9 5 2,29 25 22 XI
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