EXPERIMENT STATION REPORTS. 287 



KEPORT OF THE SECTION OF ANIMAL I'ATHOLOGY. 



Director K. S. Sliaw, College. 



Dear Sir: — I submit herewith the report of the Animal Pathologist 

 for the year ending June 30th, 1920. 



A large part of my time has been devoted to a histo-pathological 

 examination of the reproductive organs of sterile cows. This work 

 was done in cooperation with the Department of Bacteriology, the 

 latter department having made bacteriological examinations of the cases 

 studied by the writer. This work pertains to a very imjiortant phase 

 of the abortion problem, and is fundamental because of the fact that the 

 most effective control measures cannot be worked out without a full 

 knowledge of the nature of the disease. The results of this investigation 

 may be found in a manuscript that constitutes a part of this report. 



In addition to the above, considerable time has been given to a his- 

 tological study of the effects of medicinal agents upon the reproduc- 

 tive organs of cattle. The usual treatment of sterility in cattle is more 

 or less empirical and it is believed that our researches on the effects 

 of medicinal agents on the reproductive organs will throw a great deal 

 of light upon this important problem. This work is progressing satis- 

 factorily and it is hoped that we will soon be able to present a manu- 

 script covering it. 



That our researches are bearing fruit is indicated by the fact that two 

 weeks of the last year were spent by the writer in an adjacent state lec- 

 turing on the results of our researches at this Station and he also ap- 

 peared on the program of several important meetings in this and two 

 adjoining states. 



Respectfully submitted, 



E. T. HALLMAN, 

 Animal Pathologist. 

 East Lansing, Mich., June 30, 1920. 



