NINETEENTH ANNUAL REPORT 111 



Dresden. — The Veterinary College laboratories and clinics. 

 The finest municipal abattoirs and stock yards in the world are 

 here. 



Leipsic. — The tuberculosis research laboratories of the Vet- 

 erinary Institute under the direction of Professor Eber, who is 

 doubtless the greatest authority on tuberculosis on the Continent. 



Berlin. — The famous Veterinary College laboratories. Here 

 is the largest animal clinic in the world, where over 15,000 ani- 

 mals are treated annually. The German Serum Society. The 

 Imperial Board of Health research laboratories, at Gross Lich- 

 terfelde. 



Hanover. — The Anatomical Museum. The pathological and 

 bacteriological laboratories in connection with the Veterinary 

 College. 



Utrecht. — The animal hospital, clinics, quarantine station, 

 pathological and bacteriological museums in connection with the 

 Veterinary College and University. 



Rotterdam. — Government Serum Institute. 



Some most valuable information gained was through the dem- 

 onstrations by Professor Levadatti, of the Pasteur Institute, by 

 means of motion pictures, of the diseases of the blood. Of par- 

 ticular interest to me were his studies and demonstrations of 

 the life cycle of the blood parasite, Filaria immitis, a worm 

 which we found produced a fatal disease among our California 

 Sea-Lions some years ago; also his demonstrations of trij^yana- 

 somes in the blood of various animals. Motion pictures were 

 seen which showed the Trypanasomes free in the circulating 

 blood, and also the effect on these parasites after the blood was 

 treated with curative serums. Other films showed the develop- 

 ment of intestinal flora in living animals. 



At these laboratories I also had an opportunity of studying 

 the work being done on malignant tumors and cancers of ani- 

 mals. Professor Boree, the specialist of the Institute in the 

 investigation of cancer, exhibited numerous mice affected with 

 cancer, and explained his investigations whereby he was able 

 to demonstrate the fact that cancer in these animals was infec- 

 tious and transmitted by contact, and not by heredity. 



I found at these laboratories, as well as in other places on 

 the Continent, that the motion picture apparatus was being ex- 

 tensively used for the purpose of accumulating permanent rec- 

 ords, and also for demonstrating the technic of important 



