806 EXPERIMENT STATION RECORD. 



formaldehyde may be added to milk at the rate 1 part to 40,000. It is maintained by 

 the author that the protective bodies are regularly found in the blood when the 

 animal is in the process of recovery from infection. 



The only true remedy for infectious diseases appears, therefore, to consist in the 

 use of protective bodies obtained from the blood or other body fluids of animals 

 which have recovered from the disease in question. The chief danger of infection 

 of both calves and children is believed to occur in early life from drinking milk con- 

 taining tubercle bacilli. The appearance of pronounced symptoms of the disease 

 may not be noted until later life. 



Immunization of cattle against tuberculosis, E. vox Behring (Beitr. Expt. 

 Ther., 1905, No. 10, pp. 1-21). — In this article a brief review is presented of the 

 work thus far carried out at the Marburg University under the author's direction, 

 especially on the problem of vaccinating cattle to render them immune against tuber- 

 culosis. An attempt is made to present definitions of certain terms used in con- 

 nection with this problem, especially virus, vaccine, jennerization, pasteurization, 

 immunity, etc. 



It is reported that about 10,000 cattle have been immunized according to the 

 author's method with good results. This work has been done partly by men work- 

 ing directly under the author and partly by other veterinarians. The small propor- 

 tion of failures which have occurred seem to be capable of explanation, so that no 

 serious defect has been found in the method. 



The action of tubercle bacilli of different origin, R. Link {Arch. Hyg., 53 

 (1905), Xo. 3. pp. 264-274) . — In order to test as delicately as possible the differences 

 in morphology and pathogenic action between tubercle bacilli of human and bovine 

 origin the author inoculated rabbits in the anterior eye chamber with accurately 

 weighed quantities (0.0001 to 0.0002 gm.) of cultures of tubercle bacilli. The bacilli 

 of human origin came from an advanced case of consumption, that of bovine origin 

 was obtained through the kindness of Professor von Behring. 



A preliminary test of these cultures showed that guinea pigs inoculated in the body 

 cavity with the human bacilli died within 23 days of generalized tuberculosis, while 

 the bovine bacilli did not seem to be so virulent when inoculated in this manner. 

 The results obtained in various experiments are presented in a tabular form. It 

 appeared from these experiments that the bovine bacilli are short rods without any 

 granulation, while the human tubercle bacilli frequently show granulation. Guinea 

 pigs inoculated with human bacilli showed large numbers of the tubercles, while the 

 bovine bacilli appeared more likely to produce diffuse inflammatory processes. 



No differences were observed in the pathological processes whether the animals were 

 inoculated with 0.0001 or 0.0002 gm. of the cultures. In general the course of the 

 disease was more severe after infection with bovine than with human tubercle bacilli. 

 A general infection, however, took place in all cases. 



Tuberculosis in cattle and tuberculin tests of the station herd, J. M. Scott 

 (New Mexico Sta. Bid. 55, pp. 15, pis. 5). — Notes are given on the nature, symptoms, 

 method of infection, and prevalence of tuberculosis. The nature of tuberculin is 

 briefly stated, together with directions for making the tuberculin test. 



The literature relating to the subject of feeding tuberculous milk is discussed. 

 Two calves from tuberculous cows were allowed to take the milk of these cows. 

 Both of these calves developed tuberculosis, while a third calf, also from a tubercu- 

 lous cow, did not develop the disease when not allowed to take its mother's milk. 

 It is believed that tuberculosis could be eradicated from the Territory by a thorough 

 application of the tuberculin test and the destruction of reacting cattle. A test of 

 the station herd, consisting of 19 calves, indicated that 15 per cent w r ere tuberculous. 



Vaccination against tuberculosis in Melun, E. Thierry (Jour. Agr. Prat., 

 n. ser., 10 {1905), No. 50, pp. 749, 750). — A brief account is given of experiments 

 carried out in Melun by Vallee. The cattle on which the experiments were made 



