SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 89, NUMBER 5 



IRoebling jfunb 



FORECASTS OF SOLAR VARIATION 



BY 



C. G. ABBOT 



Secretary, Smithsonian Institution 



(Publication 3214) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



MARCH 27, 1933 



