782 EXPERIMENT STATION RECORD. 



aud thirsting guinea pigs and rabbits, tlie walls of the stomach and intestines 

 were found to be permeable to bacteria. After feeding, the latter were found 

 in various oi-gans within a very short time and persisted for long periods. In 

 guinea pigs the bacteria pass through tlie walls of the stomach and intestines 

 about equally fast, while in rabbits the stomach seems to be more readily 

 permeable than the intestines. Bacteria pass through the walls of the ali- 

 mentary tract more readily in rabbits which are allowed to thirst than in 

 tho.se which receive green food and plenty of water. 



Ked lymph glands, Baum (Deut. Tierdrztl. Wchnschr., 1.5 (1907), No. 3Jf, 

 pp. JflJ-'iSO, fig. 1). — In most of our domesticated animals red lymph glands 

 are occasionally found. This condition occurs most frequently in cattle and 

 sheep, rarely in dogs, and perhaps never in the horse. They may occur in all 

 parrs of the body, but particularly in the pleural and peritoneal cavities and 

 near the true lymph glands. The size varies from a millet seed to a walnut. 

 These structures may be distinguished from true lynqth glands by their pos- 

 session of a large lymph sinus and by the accumulation of red blood corpuscles 

 in them. 



Disintegration of rabies virus in vitro by radium, G. Tizzoni and A. Bon- 

 (iiovAXNi (CcntbJ. Bakt. [etc.^, 1. AM.. Orig.. .',.', {1901), No. .',, pp. 353-360).— 

 Radium emanations and rays working separately have no effect on rabies virus, 

 l)ut operating simultaneously they produce an effec-t. Aluminum allows more 

 rays to pass through than any other metal used in the construction of the tubes. 



Staining Negri corpuscles, O. Lentz (Centhl. Bakt. [etc.], 1. Abt., Orig., 

 .'i'/ {1907), yo. 'i, pp. J7J-J7,S, pis. 2). — Teased pi-eparations of the hippocampus 

 are run through grades of alcohol aud stained according to the method of Bohne 

 in eosin and Loeffler's methylene blue. 



Transmission of trypanosome infection in intermediate hosts, E. Brumpt 

 {Compt. Rend. Noc. Biol. [Parisi, 63 (1907), No. 26, pp. 176-178) .—\ study of 

 trypanosome infection in leeches showed that certain species, particularly 

 HclohdvUii (ilgira, transmit Triipano-soina inopituitinn to their offspring through 

 the reproductive cells. The trypanosomes invade the egg in an ameboid form, 

 and may be transmitted to frogs by parasitism with leeches. On the other 

 hand the trypanosomes may pass from mother to offspring indefinitely without 

 the intervention of a vertebrate host. 



A comparative study of tubercle bacilli of different origin, A. Weber 

 {Tultcrkulosc Art). K. Gsndhtsamt., 1907, Nd. 6. pp. l-l'i). — The extensive 

 study and experiments which have been carried out at the German Imi»erial 

 Health Office on tubercle bacilli obtained from different souix-es are briefly 

 sununarizetl in the present article. 



It api)ears that distinction should be made between the avian and mammalian 

 forms of tubercle bacilli and that among the mammalian tubercle bacilli, two 

 types, the human and bovine, can be set up as tolerably distinct. No trans- 

 formation of the avian into the mammalian form has been observed in experi- 

 ments carried on continuously for two years. Similarly no evidence was secured 

 for the transformation of the human type into the bovine type of tubercle 

 bacilli. As a rule the l)ovine tyiie of tubercle bacilli in man produces lesions 

 which are largely restricted to the point of entrance and the corresponding 

 lymphatic glands. In some cases, however, a generalized and fatal form of 

 tuberculosis is thus brought about. 



Feeding avian tubercle bacilli to hogs and colts, C. Titze (Tul)erkulo.<ie 

 Arb. K. Gsndhtmmt., 1907, No. 6, pp. 215-219). — Large quantities of tubercle 

 bacilli obtained from fowls were fed to 4 hog.s, but in no case was a progressive 

 infection jjrodu'ced. The only result was the appearance of slight changes in 



