HORACE D. ARNOLD 



PROFESSOR OF CLINICAL MEDICINE, TUFTS COLLEGE 



MEDICAL SCHOOL 



DEAR DR. ERNST, --The following is a brief outline 

 of my remarks before the Committee on Probate and 

 Chancery: 



As a physician in active practice I wished to testify 

 to the great practical importance of the investigations 

 carried on by the laboratory workers. 



In considering the proposed bill, it seemed fair to 

 consider the term " vivisection " as employed by the 

 petitioners as practically the equivalent of " animal ex- 

 perimentation " as used by the medical profession. My 

 objection to the bill was, chiefly, that it would seriously 

 hamper such " animal experimentation." 



What has " animal experimentation" accomplished for 

 humanity? Diphtheria was taken as an illustration, not 

 because it was the only instance, but because it would be 

 more easily understood by the non-medical mind. 



In connection with diphtheria, " animal experimentation " 

 has accomplished the following results : 



1. A better understanding of the disease, and conse- 

 quently greater ability to treat it successfully. 



2. Since diphtheria is a type of the infectious diseases, 

 we thus get a better understanding of infectious diseases 

 in general. 



3. It has given us a little insight already into the 

 problem of immunity --or that condition which protects 

 the individual from an infectious disease. We confidently 

 expect that " animal experimentation " will in the future 

 solve this problem of immunity and thereby furnish the 



