6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, I48 



10. Discovery of these identical harmonic periods in terrestrial 



temperature, and in precipitation, and a method of long- 

 range forecasts based thereon. 



11. Discovery of opposing trends in terrestrial temperature, at- 



tending for 16 days after rising and falling trends in solar 

 radiation. 



12. Fowle's work on terrestrial radiation and its absorption. 



13. Aldrich's measure of the earth's albedo. 



14. Aldrich's work with the honeycomb pyranometer, 



15. Aldrich and Hoover's work, in volume 7 of Annals, on the 



solar constant, and on solar and sky radiation at military 

 camp sites. 



16. Work of the Division of Radiation and Organisms, a subsidi- 



ary branch of the A.P.O., founded by Secretary Abbot in 

 1929. 



CRITICISM OF CERTAIN METEOROLOGICAL FINDINGS 



While many of the pieces of work are everywhere praised and 

 accepted,* professional meteorologists have disparaged the alleged 

 results indicated by numbers 2, 7, 8, 9, 10, and 11, listed above. I had 

 hoped to overcome their doubts by my publication 4545.^ However, 

 recent private advices from responsible officers of the U.S. Weather 

 Bureau, the American Meteorological Society, and the High Level 

 Atmospheric Observatory at Boulder, Colorado, convince me that 

 their doubts still remain. As I feel quite certain of the soundness of 

 these A. P.O. results, I feel a duty to dispel these official objections. 

 In the remainder of this paper new evidence will be presented. 



A DEFENSE OF CERTAIN METEOROLOGICAL FINDINGS 



SOtAR RADIATION AND ITS VARIABILITY 



Numbers 2 and 7 — The accuracy of A. P.O. measures of the solar 

 constant, and the limits of its variation. 



Referring to table 1, page 13 of Pub. 4545,^ the probable error of 

 one day's solar constant measure at one station (usually the mean of 

 three independent observations) is -^ of 1 percent. It is certified by 

 1992 pairs of solar constant measures on identical days made at four 

 observing stations at all times of the year. One station is in the 

 Southern, three in the Northern Hemisphere, and they are separated 

 by thousands of miles. Table 1, just cited, is composed of four sec- 



* See expert opinions given in volume V of Annals, A. P.O., pp. 32-35. 



