DEPARTMENT OF EMBRYOLOGY.* 



Franklin P. Mall, Director. 



During the past year, in addition to the completion of a number of 

 researches which will be detailed in the following report, several events 

 have occurred that signify progress in the organization and devel- 

 opment of the general plan of our work in embiyology. First of all 

 should be mentioned the formal estabUshment of this work as a 

 definite department of the Carnegie Institution of Washington, which 

 was authorized in December 1914. 



This has been followed by an increase in our permanent staff. 

 Margaret R. Lewis was appointed collaborator on January 1. Mrs. 

 Lems's recent investigations have been in the domain of experimental 

 cytology and her work constitutes an important factor in our plans for 

 the development of the experimental side of embryology. Our cytolog- 

 ical investigations will receive further support by the appointment of 

 Professor Jules Duesberg as Research Associate. Professor Duesberg, 

 who is well known in connection with his work on mitochondria, was 

 professor of anatomy at Liege before the German occupation of Belgium. 

 On account of the interruption of his work by the war he came to this 

 country and since February 15 has continued his researches under the 

 auspices of our Department. 



Professor Evans resigned his position as Research Associate on June 1 

 in order to take up his duties as professor of anatomy in the University 

 of Cahfornia. His work, which was outhned in my previous report, 

 has been continued, but unfortunately has not reached a conclusion. 

 During the spring Professor Bartelmez, of the University of Chicago, 

 came to Baltimore to work with Professor Evans on the anatomy of 

 human embrj^os of about 2 m^m. in length, and it is now planned to have 

 Professor Bartelmez continue this work. 



Sarah J. Phelps was appointed assistant to Dr. Streeter on the 1st of 

 September 1914. Joseph Drane and Ethel S. Duffield were appointed 

 technical assistants, the former on September 1, 1914, the latter on July 

 1, 1915. 



Together with the increase in our staff, provision has been made for 

 more adequate quarters. A new fire-proof building is now being erected 

 by the Johns Hopkins University adjacent to our present location, one 

 floor of which, consisting of 4,400 square feet, has been especially 

 designed for our purposes. 



The European war has seriously interfered with the work of Professor 

 Keibel and has deprived him of all of his assistants, one of whom, Dr. 



*Addre3S, Johns Hopkins Medical School, Baltimore, Maryland. 



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