REPORT OF THE SECRETARY 101 



PERSONNEL 



On June 30, 1944, Dr. C. G. Abbot, for many years Director of the 

 Astrophysical Observatory, retired from administrative work. L. B. 

 Aldrich was appointed Acting Director, and on April 16, 1945, he suc- 

 ceeded to the post of Director. It is a pleasure to record that Dr. 

 Abbot remains at the Observatory as research associate and that his 

 advice and help continue to be available to the staff. 



As of June 1, 1945, L. B. Clark, expert glass blower and technician 

 of the Division of Radiation and Organisms, was placed in charge of 

 the construction of instruments and equipment for both divisions of 

 the Observatory. 



PUBLICATIONS 



During the fiscal year the following publications on the work of the 

 Observatory were issued : 



Abbot, C. G., Weather predetermined by solar variation. Smithsonian Misc. Coll., 



vol. 104, No. 5, July 1944. 

 Abbot, C. G., On the 27.0074-day cycle in Washington precipitation. Smithsonian 



Misc. Coll., vol. 104, No. 9, February 1945. 

 Aldrich, L. B., Smithsonian pyrheliometry and the Andean volcanic eruptions of 



April 1932. Smithsonian Misc. Coll., vol. 104, No. 6, July 1944. 

 Aldrich, L. B., Solar radiation observations and volcanic dust. Nature, vol. 154, 



No. 3914, p. 53S, London, November 1944. 

 Weintraub, R. L., Radiation and plant respiration. Bot. Rev., vol. 10, No. 7, July 



1944. 

 Weintraub, R. L., Chemotherapeutic agents from microbes. Ann. Rep. Smith- 

 sonian Inst, for 1943, October 1944. 

 Weintraub, R. L., and Price, Leonard, Influence of various substances on sugar 



determination by copper and ferricyanide reagents. Smithsonian Misc. Coll., 



vol. 104, No. 10, March 1945. 



Respectfully submitted. 



L. B. Aldrich, Director. 



