20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I28 



New York as 6.6485 days, is very near 6.6476 days, which is 1/1250X 

 365.2546 X 22|. 



I have presented graphs and tables showing solar periods and how 

 interference by periods aliquotly related to them is removed. With 

 such clearance, the total monthly mean solar constant is synthesized 

 from 31 periods, and compared with mean observation. Close agree- 

 ment is found, with an average deviation over 3 years of 0.062 

 percent, and correlation of 90 ±5 percent. 



One graph gives synthesized solar-constant monthly values, 1900 to 

 1923. It is stated that, apart from the unusual, the solar constant should 

 repeat at intervals of 273 months in the monthly means. I showed 

 20 years ago that daily trends in the solar constant are closely corre- 

 lated with weather trends, and later showed them correlated with 

 ionospheric data. Monthly weather features should not closely repeat 

 at intervals of 273 months, because of phase changes of weather 

 periods, due to atmospheric changes. 



