2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I43 



Senate but was defeated in the House. It was never revived and 

 would now be futile. The multiplication of airplanes and rockets now 

 befoul the atmosphere, and the world turmoil which prevails would 

 endanger observers. The conditions would now negative such a proj- 

 ect. Besides, it could not produce without fail daily values as good 

 as those now possible from satellites. 



The two papers referred to, and another of somewhat later date to 

 which I shall refer, are long out of print. They may be consulted in 

 some 1,500 libraries, the world over, to which the Smithsonian Insti- 

 tution freely sends its publications. 



To bring the matter to the attention of the present generation, my 

 assistant, Mrs. Lena Hill, and I have collected all the solar-constant 

 observations made at Montezuma, Chile, 1924 to 1955, and have 

 repeated the study of solar-produced trends associated with them on 

 the temperatures at Washington. We used about twice as many data 

 as were formerly available. The present results are smoother than 

 but not markedly different from those given in Publications 3392 

 and 3397. 



These results are not to be used now for forecasting, but only to 

 illustrate what may be done from satellite observations. I therefore 

 omit details that would demonstrate what accuracy they may have for 

 temperature forecasting. I merely show by graphs and tables what 

 were the end results and how they compare with those of 25 years ago. 



Before presenting this evidence, I refer to another paper. 2 Here 

 it is shown that there is in the weather of Washington and New York 

 a regular period of about 6| days. I now evaluate it as 6.6476 days. 



This is exactly of 273 months, the master period on which I 



based my forecasts of precipitation to 1967. 3 



As shown in Publication 3892, this is a strong period in Washing- 

 ton and New York weather. Its effect on temperature sometimes 

 overpowers the effects of upward and downward trends in solar varia- 

 tion. We did not know of its permanently continuous regular pulses 

 when Publications 3392 and 3397 were published. Hence those results 

 were somewhat confused by it. 



Antecedent to our present determination of the regular trend effects 

 on the temperature at Washington, Mrs. Hill and I redetermined the 

 phases and the amplitudes of the period of 6.6476 days. Then we 

 removed its effects from all the solar-constant measurements, 1924 



2 Smithsonian Misc. Coll., vol. 107, No. 4, Publ. 3892, 1947. 



3 Smithsonian Misc. Coll., vol. 139, No. 9, Publ. 4390, i960. 



