VETERINARY MEDICINE. 783 



studies of the pathological changes elicited in a variety of animals naturally and 

 experimentally infected with Trypanosoma hippicum; namely, native horses, 

 American mules and work horses, dogs, raccoons, monkeys, CcbuH hypoleiicus, 

 Nyctipitlicois sp., rabbits, guinea pigs, rats, mice, and coati. 



Trypanosomes infecting- game and domestic stock in the Luangwa Valley, 

 northeastern Rhodesia, A. Kinghokn and W. Yorkk (Ann. Trap. Med. and 

 Pur., a (1012), No. 3, pp. 301-315). — "Trypanosomes are of frequent occurrence 

 in game and domestic stock in the Luaugwa Valley. At least 37.5 per cent of 

 the buck harbor parasites. Six species of trypanosomes were found, viz, Try- 

 panosoma rhodesiense, T. vivax, T. nanum, T. pecorum, and 2 others, of which 

 one was possibly T. montgomcryi. 



" Cilossina, morsitans in nature transmits 2 of these trypanosomes, viz;, T. 

 rhodesiense and T. pecorum, and probably also transmits at least 2 others, viz, 

 T. vivax and T. nanii'm. Circumstantial evidence exists to show that T. 

 peeorum may be transmitted by biting insects other than tsetse flies." 



Serological methods for diagnosing trypanosome diseases, F. RtrppEKX 

 (Berlin. Tierarzil. Wchnschr., 28 (1912), No. 22, pp. 381^83) .—This is a study 

 and description of serological methods for diagnosing dourine and nagana with 

 the aid of agglutination, precipitin, the Porges-Meier reactions, and the comple- 

 ment fixation method. Good results were obtained with the first '.i methods, 

 but the tests with the complement fixation method were not conducted under 

 ideal conditions. 



The relation of animal fat to tubercle bacillus fat, W. C. White and A. ^I. 

 Gammon (Jour. Med. Research, 26 (1912), No. 2, pp. 257-266) .—In this paper 

 the results of a preliminary study of the behavior of various animal and vege- 

 table fats, viz, stearic acid, oleic acid, palmitic acid, linolic and linoleic acid, 

 and butter and human fat with tubercle bacilli growing on glycerin agar, are 

 reported. Olive oil was used as a source for the oleic acid, palm oil for the 

 palmitic acid, linseed oil for linolic and linoleic acids, and beef suet for the 

 stearic acid. On the basis of the results obtained the authors suggest an 

 explanation for the caudal lobe lesions in cattle and the apical lesions in 

 tuberculosis of man, as follows : 



The pulmonary artery, before dividing into the right and left pulmonary 

 branches, forms a great bay of blood bounded by a very elastic vessel wall. 

 The blood in this portion of the pulmonary artery must move with comparative 

 slowness, because of the short circuit which it makes in comparison with the 

 long circuit made by the general aortic quota of blood. In this great bay the 

 blood is loaded with fatty derivatives of low specific gravity compared with the 

 whole blood. Owing to the slowness of the current, these compounds have a 

 chance to rise to the surface of the stream, so that the upper layer of blood in 

 the pulmonary artery should have a much larger content of fatty compounds 

 than the lower one. At the highest point of this main blood stream in man 

 the vessel arises that supplies the apex of the upper lobe on either side, so that 

 if the theory advanced be correct, this vessel should be the vessel most laden 

 with the fatty compounds of low specific gravity which are being poured into 

 the pulmonary stream by the liver mechanism. " This view, coupled with the 

 results of our experimental work so far completed, which shows that the 

 tubercle bacillus makes use of these compounds for its more abundant growth, 

 seems a most reasonable explanation of its more prevalent development in the 

 apex of the upper lobe." 



The relations between the human and the bovine type of tubercle bacillus, 

 G. S. WooDHEAD (Lancet [London], 1912, I, No. 22, pp. 1^51-1 1/57). — This is an 

 address delivered at the International Conference of Tuberculosis, held at 



