204 CARNEGIE INSTITUTION OF WASHINGTON. 



STAFF. 



Such time as the Director could give to astronomy during the year 

 has been mainly devoted to solar investigations, continued in collab- 

 oration with several members of the staff. Dr. Walter S. Adams, 

 Assistant Director, has pushed forward his investigations in stellar 

 spectroscopy and has had general charge of the Observatory during the 

 Director's absence. Professor Frederick H. Scares, superintendent of 

 the Computing Division and editor of the Observatory publications, has 

 continued his researches in stellar photometry, the determination of 

 the position of the sun's magnetic axis, and other subjects. Dr. Arthur 

 S. King, superintendent of the Physical Laboratory, has carried on 

 various investigations with the electric furnace. Dr. Charles E. St. 

 John has given most of his attention to the determination of the funda- 

 mental wave-lengths of solar and standard lines, with special reference 

 to a possible relativity effect. Professor G. W. Ritchey has remained 

 in charge of the work of the optical shop and has continued the photog- 

 raphy of nebulae with the 60-inch reflector. Dr. J. A. Anderson has 

 devoted most of his time to the study of the Stark effect. Mr. Harold 

 D. Babcock has continued his investigations on standards of wave- 

 length and related subjects. Mr. Ferdinand Ellerman has given 

 much of his time to solar observations and has served as Observatory 

 photographer. Mr. Francis G. Pease, in charge of instrument design, 

 has given special attention to the 100-inch telescope, besides continuing 

 his photographic work on nebulae and star clusters. Dr. Harlow 

 Shapley has advanced his investigations of star clusters, variable stars, 

 and stellar photometry. Dr. Adriaan van Maanen has continued his 

 determinations of stellar parallaxes and the measurement of spectra 

 to fix the position of the sun's magnetic axis. Dr. Seth B. Nicholson 

 has given most of his attention to solar observations and has calculated 

 the orbit of the ninth satellite of Jupiter. Professor Alfred Joy, who 

 has been engaged in stellar spectroscopic work, has also taken part in 

 the solar observations. Dr. Gustav Stromberg has devoted himself 

 to the study of the stellar spectroscopic results. Mr. Ray Campbell 

 assisted in the solar observations until May, when he resigned his posi- 

 tion. His work was continued by Dr. Walter T. Whitney from that 

 time until the end of August, when Mr. Arthur S. Dockham joined the 

 staff to assist in these investigations. 



Professor J. C. Kapteyn, for ten years Research Associate of the 

 Institution, has not been able to visit Mount Wilson since early in the 

 war. He is actively continuing his work in Groningen, however, and 

 we are providing material for some of his investigations. 



The members of the Computing Division have assisted in the work 

 of the various departments as follows : Miss Ware and Miss Miller have 

 been engaged with the solar investigations carried on by Dr. St. John. 

 Miss Burwell, Miss Stone, Miss Shumway, and, for a part of the time, 



