VETERINARY SCIENCE AND PRACTICE. 1009 



The action of the poisonous principle of Equisetum hyemale, Matz and 



Lui)i:\vi(i (/Jsclir. Vitrriiairk., lo {190-i), No. 2, pp. 49--54) ■ — The author.s' experiments 

 (^liowtd that the poisonous principle of E({uisetuni was apparently neither an alka- 

 loid nor <,durosid, l)nt was aconitie acid. This acid, obtained free, caused the death 

 of izuiiH a pi,i:s to which it was feil, and was also shown to be poisonous for horses. 



Tuberculosis; its nature, distribution, cause, and prevention, W. Schumbukg 

 (Die Tvbcrkulose, ihr Wesen, ihreVerbrcitung, UrsucJte, Vcrhutung aud Ilellniuj. Leipzig: 

 B. G. Ti'ubner, 1903, pp. 139, pi. 1, Jig.'f. S) . — A general account is given of the nature 

 of tuterculosis, its various clinical forms in man and animals, the distribution of the 

 disease, and the means of infection. Particular attention is given to sanitary regula- 

 tion of tuberculous human ]>atients, the control of tuberculosis among cattle, and 

 the proper treatment of tuberculous meat and milk. 



The passage of tubercle bacilli through the normal intestinal wall, IM. P. 

 Ravenel {Jour. Med. Ee.'<ean'h, 10 {1903), No. 3, pp. 460-462).— Thi- author selected 

 healthy dogs and fed them upon an emulsion of ecpial parts of melted butter and 

 warm water containing numerous tubercle bacilli. The dogs were killed Si or 4 hours 

 after feeding, and the chyle was collected for examination. The mesenteric glands 

 were also examined. No lesion was observed in any case in the alimentary tract. 

 Tubercle bacilli, however, were found in the chyle or mesenteric glands of all 10 

 dogs upon which experiments were made. 



As a result of these experiments the author concludes that, at least under certain 

 conditions, tubercle bacilli may readily pass through the normal intestinal wall and 

 infect the animal without causing any lesion in the alimentary tract. 



Cerebral tuberculosis in heifers, C. Besxoit {Eer. ]'el. Toidouse, 28 {1903), No. 8, 

 pp. 46.5-472). — Detailed notes are given on the symptoms and pathological anatomy 

 of a case of tuberculosis in a heifer in which the meninges of the brain and other 

 cereliral structures were affected. 



The immunization of young cattle against tuberculosis, Thomassen {Rec. 

 Med. Vet., S. ser., 10 {1903), No. 1, pp. 5-19).— The literature of this subject is 

 briefly reviewed, with special reference to the experiments of von Behring. In the 

 author's experiments a number of young cattle were used and were inoculated intra- 

 venously with tubercle bacilli of human origin. Detailed notes are given on a series 

 of 5 experiments. From these experiments the author concludes that cattle endure 

 intravenous inoculations of human tubercle bacilli in do.ses of 30 mg. The first 

 inoculation does not produce any reaction until after 10 to 15 days, while the second 

 and third injections produce an elevation of temperature within 24 hours. The 

 author is not disposed to draw definite conclusions from his exi^eriments regarding 

 the practiciil value of this method of immunization. 



Protective vaccination for tuberculosis, M. Schlecjel {Berlin. Tierdrzil. 

 Wdiuschr., 1903, No. 49, jw- 74S-750). — A test was madeof the efhcacy of von Behring's 

 method in immunizing cattle against tuberculosis (E. S. R., 14, p. 393). Two immu- 

 nized cattle were obtained from the Marburg Institute and the results obtained from 

 inoculation of these cattle were comi)ared with the effects of inoculation of 3 control 

 cattle. In the first exjieriment the immunized cattle and 1 control animal were used 

 and it was found by tuberculin injecti(jns that the 2 immunized cattle were still affected 

 liy tuberculosis. All 3 animals were inoculated with virulent material obtained 

 from the lymphatic glands of a tuberculous beef animal. Inoculations of guinea pigs 

 with this material showed that the tubercle bacilli were exceedingly virulent. Dur- 

 ing the first 3 weeks after inoculation no reaction was shown in any of the animals. 

 After that time, however, in the control animal a considerable elevation of tempera- 

 ture and other symptoms of infecticm were observed. A tuberculin test made 9 

 weeks after inoculation produced a decided reaction in all 3 animals. 



These 3 animals were then subjected to a second inoculation with virulent mate- 

 rial and the results were compared with the effect of similar inoculation in 2 healthy 



