486 EXPERIMENT STATION RECORD. 



in neai-ly all of the sheep slaughtered at Paris abattoirs. Chatton thinks they 

 represent a stage in the life cycle of S(ircocys1i.<i tcneUa. 



Investigations in regard to kidney cysts in the hog, F. Brijcklmayer 

 ( Untersuchungen ilber Nierenzysten heitn Schivein. Inaug. Diss., Hochsch. 

 Dresden, 1910; rev. in Zenthl. Biochem. u. Biophys., 10 (1910), No. 8, p. 383). — 

 These cysts are usually in the cortex and the medulla and usually contain a 

 clear yellow odoriferous urine-like fluid, which in one instance had a specific 

 gravity of 1.007, total solids 1.13 per cent, nitrogen 0.24 per cent, and water 

 98.87 per cent. This fluid was in most instances sterile, but at times contained 

 cocci or coli bacteria but no other cellular elements. The walls of the cyst con- 

 sisted of a many layered epithelium and fibrillar connective tissue. The paren- 

 chyma of the kidneys thus affected was, however, generally normal. 



Contributions to the etiology of swine plague, P. Frosch and R. Broll 

 (Ztschr. InfcktioHSkrank. u. liiig. Hausiicre, 7 (1910), No. 1-2, pp. 20-27). — 

 Injecting unfiltered and filtered lung extracts obtained from shoats affected 

 with chronic swine plague (and which came from pens where no animals were 

 present which had the characteristic intestinal lesions of hog cholera) into 

 young pigs produced in a majority of instances typical hog cholera. In two 

 cases the animals remained sound, and in another the results were doubtful. 

 When lung extracts containing Bacillus suisepticus were injected hog cholera 

 was produced in one instance but not swine plague, and in another swine plague 

 and hog cholera. 



It would thus appear that the ovoid bacterium which often inhabits the sputum 

 of healthy hogs finds a haven in the lung tissue which has been attacked and 

 weakened by the virus of hog cholera and there produces secondary changes. 

 Vaccinating young shoats with hepatic, splenic, and renal extracts from ani- 

 mals with chronic swine plague produced no hog cholera. 



Krafft's vaccine against swine plague, K. Poppe (Berlin. Tierdrztl. 

 Wchnschr., 26 (1910), No. 26, pp. 509-511). — Experiments on rabbits, guinea 

 pigs, luid mice with Kraft't's vaccine against swine plague were of no value in 

 protecting against Bnrillus stiisepticiis. 



Hereditary unsoundness in horses, S. S. Cameron (Jour. Dept. Agr. Vic- 

 toria, 8 (1910), No. 5, pp. 328-3.'i7). — Notes on evidence as to the hereditary 

 character of certain pathological conditions constituting unsoundness in horses, 

 principally ossification of the lateral cartilages (sidebone), furnished by exam- 

 ination of 2.630 cases are presented. 



The refraction anomalies and the etiology of myopia in the eye of the 

 horse, D. Czerwonsky (Beitrag zur Kenntnis der Refractionsanomalien und zur 

 Aciiologie der Myopic dcs Pfrrdeauges. Inang. Diss., Univ. Bern, 1908, pp. 38, 

 figs. 3). — The results of the opthalmological examination of 370 horses showed 

 49.1 per cent to be emmetropic and 50.9 per cent to be ametropic, 29.G per cent 

 being myopic and 21.3 per cent hypermetropic. Myopia was found to be more 

 frequent in the cold-strained animals which had narrow but long, high orbits. 

 On the other hand, warm-blooded animals which had orbits almost equal in 

 breadth and length were either hypermetropic or emmetropic. Myopia, accord- 

 ing to the author, is to be considered a question of race and inherited disposition. 



Equine trypanosomiasis in the Canal Zone, S. T. Darling (Bid. Soc. Path. 

 Exot., 3 (1910), No. 6, /)/>. 381-385; Amcr. Vet. Rev., 31 (1910), No. 3, pp. 375- 

 379). — Under the name of Trypunosoina hippicum, the author describes a patho- 

 genic trypanosome which was first found in the blood of mules received at 

 Ancon, Canal Zone, from the United States in April, 1909. 



The disease corresponds clinically with the swamp fever or infectious anemia, 

 which occurs among horses in some sections of the United States. " The 

 trypanosome appears and disappears with irregularity, appearing in numbers 



