VETERINARY SCIENCE AND PRACTICE. 993 



preyeuce of well marked tubercular nodules as large as pigeons' eggs in the lungs, and 

 tubercles of various sizes in the liver. The lymphatic glands were also attacked. A 

 bacteriological study of these tuljercles determined the presence of the tubercle 

 bacillus. 



Experimental tubercular mammitis in the guinea pig, L. Xattax-Larrier 

 {Compl. Rend. Soc. Bid. Paris, 52 {1900), Xo. 37, p. 1024). — By direct injection of the 

 fluid containing the tubercle bacillus into the mammary gland of the guinea pig, it 

 was found that a local tubercular abscess was produced within a short time. Indu- 

 rated tuberculosis developed in the glands within from 4 to 5 days, and at the end 

 of 2 weeks a true abscess was formed of considerable size. The experiments indicated 

 that the mammary gland of the guinea pig, like that of domestic cows, is especially 

 susce]itil;)le to this disease. 



The influence of an inoculation of virulent tubercle bacilli in the dog- 

 upon the agglutinating pcvp-er as determined by a previous inoculation of 

 attenuated bacilli, S. Akloix(; and P. Coukmoxt {Coinpt. Rend. Soc. Biol. Pari.^, 32 

 (1900), No. 37, pp. 1025, 1026). — The authors had previously noted that the serum of 

 tuberculous animals in the last stages of the disease was often deprived of an aggluti- 

 nating power toward the tubercle bacillus. Further experiments were conducted 

 for the purpose of determining the cause of this i^henomenon. During the study it 

 was found that virulent bacilli injected into animals which were free from tubercu- 

 losis di<l not cause the appearance or increase of the agglutinating power, as was the 

 case in inoculations with attenuated bacilli. Inoculations with attenuated tubercle 

 bacillus in a dog produced a considerable increase of the agglutinating power and 

 conferred upon this animal a certain resistance to subsequent inoculations with 

 virulent bacilli. Virulent l>acilli inoculated into dogs which had previously received 

 attenuated bacilli caused a slight decrease in the agglutinating liower. 



Liver disease in calves, D. Hctcheox {Agr. Jour. Cape Good Hopje, 17 {1900), 

 No. 10, pp. 602-605). — The author reports a number of observations on this disease 

 which indicate that it may be carried from farm to farm by affected calves. The 

 disease appears to be of a contagious nature, but the jmthogenic organism has not 

 been isolated. Post-mortem examinations of calves dead of this disease show a con- 

 gestion of the mesenteric blood vessels and a striking jmleness of the muscular tissue, 

 which emits a characteristic odor. 



Kidney spot of calves, K. Vaerst {Arch. TT'/.s-s. n. Pralt. TJiierh., 27 {1900), No. 

 1-2, pp. 110-126, Jigs. 12). — The author investigated the nature of certain white spots 

 sometimes found on the kidneys of calves and often considered to be of a pathological 

 nature. Such spots were found by the author to be normal phenomena occurring in 

 about 5 per cent of slaughtered animals. The spots are believed to be due to certain 

 processes in the development of the kidney from an embryonic condition. Exjjeri- 

 ments with unspotted and spotted kidneys indicated that the taste was not badly 

 affected by the presence of the spots. 



Diseases of sucking calves, C. (). Jexsex {Maanedsskr. Dyrlxger, 12 {1900), No. S, 

 pp. 297-306) . — The author gives a brief account of the diseases to which young 

 calves are especially susceptible, and classifies them into the three groups — accidental 

 diseases, infectious (hseases, and digestive disturbances. 



Combating hog cholera, U. De Mia {Gior. R. Soc. Accad. ]'et. Ital, 49 {1900), 

 No. 50, pp. 1179-11S3). — The author reports the results of experiments in preventive 

 inoculation against hog cholera. Vaccination acconUng to the method of Perroncito 

 was without harmful effects in any case, and produced favorable results in the 

 immunity of treated animals. Of 21 hogs which were vaccinated in one locality, 1 

 died, while 19 out of 22 check animals died. In another place, 1 out of 15 vaccinated 

 hogs died, while 6 out of the 19 check animals succumbed to the disease. The 

 average mortality from vaccinated hogs according to the author's experience was 

 9.67 per 100, while that of untreated hogs was 33.68 per 100. 



