216 CARNEGIE INSTITUTION OF WASHINGTON. 



tions and has been in charge of the Department during the absence 

 of the Director. Mr. WilUam B. Varnum has supervised and dis- 

 cussed many of the results. Dr. Ralph E. Wilson has been engaged 

 on problems connected with the projected work. 



A great deal of credit is due the computing staff, which has con- 

 scientiously performed the long and voluminous computations upon 

 the work in hand. It has consisted of Mrs. Lillian F. Blanchard, Miss 

 Grace I. Buffum, Mrs. Livia C. Clark, Miss Mabel I. Doran, Miss 

 Ahce M. Fuller (who is also secretary of the Department), Mrs. Mary 

 B. James, Miss Isabella Lange, Miss Marie Lange, Miss Frances L. 

 MacNeill, and Miss Helen M. MacNeill. 



The resignation of Mrs. Mary B. James took place in June 1919. 



