REPORT OF THE SECRETARY 103 



generous manufacturing corporations, has gone far to develop highly 

 ingenious methods and apparatus for measuring solar variation in 

 the ultraviolet from sounding balloons, automatically observed on 

 the ground through radio transmission of signals. He hopes soon 

 to be in position to compare this type of results with those of solar- 

 constant work reported from our stations. 



PUBLICATION 



Dr. Abbot published a resume of his studies on solar variation and 

 weather changes in a number of the Czechoslovak scientific journal 

 concerning physics, prepared in honor of Dr. S. Hanzlik. A small 

 number of separates of this resume are available for distribution if 

 solicited by interested parties. 



PERSONNEL 



F. E. Fowle, who entered the service of the Astrophysical Observa- 

 tory in 1894, having been retired for disability, W. H. Hoover, who 

 has heretofore had special status with the Astrophysical Observatory, 

 as a field director, was promoted to the position of Senior Astro- 

 physicist on October 16, 1937. 

 Kespectfully submitted. 



C. G. Abbot, Director. 

 The Secretary, 



Smithsonian Institution. 



