2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I ID 



within the 27 days of the cycle when higher precipitation is expected. 

 The remainder of the table gives the actual dates in the different 

 months which correspond to these Roman numerals, in other words 

 the "preferred" days for the year 1948. These "preferred" days 

 should give, on the average, higher precipitation than all other days. 



Table 2. — Predicted dates when average precipitation should exceed average 

 precipitation for all other dates, Washington, 1948 



"Preferred" 



cycle places Jan. Feb. Mar. Apr. May June 



I 12 8 6 2, 29 26 22 



II 13 9 7 3,30 27 23 



III 14 10 8 4 1,28 24 



IV 15 II 9 5 2,29 25 



V 16 12 10 6 3,30 26 



XII 23 19 17 13 10 6 



XIII 24 20 18 14 II 7 



XV 26 22 20 16 13 9 



XVII 1,28 24 22 18 15 II 



XVIII 2, 29 25 23 19 16 12 



XXII 6 2, 29 27 23 20 16 



XXVI 10 6 4,31 27 24 20 



XXVIII II 7 5 1,28 25 21 



"Preferred" 



cycle places July Aug. Sept. Oct. Nov. Dec. 



I 19 15 II 8 4 1,28 



II 20 16 12 9 5 2,29 



III 21 17 13 10 6 3,30 



IV 22 18 14 II 7 4,31 



V 23 19 15 12 8 5 



XII 3,30 26 22 19 15 12 



XIII 4.31 27 23 20 16 13 



XV 6 2,29 25 22 18 IS 



XVII 8 4, 31 27 24 20 17 



XVIII 9 5 1,28 25 21 18 



XXII 13 9 5 2,29 25 21 



XXVI 17 13 9 6 2,29 26 



XXVII 18 14 10 7 3,30 27 



The tabulation on which the cycle of 27.0074 days is based began 

 January i, 1924. In the 24 years, 1924 to 1947, there were 8,766 

 days. To complete 325 cycles of 27.0074 days requires 8,777.4 days. 

 Hence 11 days of January 1948 are required additional to the 24 years 

 ending December 31, 1947. Thus I begin table 2 which follows with 

 January 12, 1948, corresponding to Roman numeral I. 



It should be emphasized that this prediction relates only to Wash- 

 ington, D. C.^ 



- This paper was finished on January 16, 1948. 



