KUKAL ENGINEERING. 83 



Cholera Specific (Noxine). Hog cholera serum used as a check gave satisfac- 

 tory results. 



The biolog'y of trichina, P. J. Schmidt, A. Ponomaeek, and Miss F. Saveliee 

 {Compt. Rend. Soc. Biol IParis], 78 {1915), No. 10, pp. 306, 307).— This is a 

 preliminary report of experimental studies made of Trichinella spiralis at the 

 zoological laboratory of the agricultural school at Petrograd. 



In studies of the effect of low temperatures it was found that 0° did not 

 have any effect upon the vitality of the encysted trichina, even if continued for 

 a period of eleven days, and a temperature of —6° C. was endured by the 

 trichina for a period of ten days. A temperature of — 9° was sometimes fatal 

 to trichina but not always, whereas a temperature of — 15 to — 16° was always 

 fatal. The attempted culture of the trichina artificially has given negative 

 results. 



The etiolog'y of pyemic arthritis in foals, F. W. Schofield {Amer. Vet. 

 Fcv., Jf7 (1915), Ko. 6, pp. 695-703). — Previously noted from another source 

 (E. S. R., 31, p. 8S7). 



Investig'ations of a disease of pigeons in which Bacillus parat3rphosus B 

 was found, M. Zingle {Ztschr. Infektionskrank. u. Hyg. Haustiere, 15 {191 Jf), 

 Ko. 3-4- pp. 268-272, fig. 1). — In investigations of an outbreak of disease among 

 pigeons at Strassburg, the author isolated a bacillus from the blood, the muscles, 

 and the organs which was identified culturally, morphologically, and sei'o- 

 logically as B. paratyplwsus B. 



Diphtheria bacilli in birds, R. Spiegelbeeg {Centbl. Bakt. [efc.]. 1. AM., 

 Grig., 75 {1915), No. 4, pp. 273-288; abs. in Berlin. Tierdrztt. Wchnschr., 31 

 {1915), No. 13, p. 150). — Bacteria simulating the diphtheria bacilli were noted 

 in diseased and healthy pigeons and also in healthy chickens. 



RURAL ENGINEERING. 



A treatise on water supply, A. Fkiedrich {Kulturtechnischer Wasserbau. 

 Berlin: Paul Pareii, 1912, vol. 1, 3. ed., pp. XVI+650, pis. 24, figs. 511).— This 

 is the first volumne, third edition, of a handbook intended mainly for the use 

 of agricultural engineers. The second volume has already been noted (E. S. R., 

 32, p. 87). 



The main subjects covered in this volume are technical soil improvement; 

 hydrometry ; soil formation, conservation, and cultivation ; soil drainage ; irri- 

 gation ; and completed drainage and irrigation systems. The physics and 

 mechanics of soils and soil formation are dealt with in considerable detail in 

 the first sections. A large amount of working data on the conservation and 

 use of surface and ground water and on methods of cultivation, prevention 

 of erosion, etc., is given. The final sections deal with the different phases of 

 drainage and irrigation, including much working data of an engineering 

 nature. 



Good water for farm homes, A. W. Feeeman (Pub. Health Serv. U. S., Pub. 

 Health Bui. 70 {1915), pp. 16, figs. 6).— This bulletin deals with the sanitary 

 aspects of farm water supplies, describing insanitary well and spring condi- 

 tions and suggesting remedies. Methods of protecting wells and springs are 

 given particular attention, and it is stated that in the event that pure water 

 can not be obtained for drinking pui-poses impure water may be purified by 

 boiling or by treating with chlorid of lime. " The chlorid of lime solution is 

 prepared by dissolving one teaspoonful of fresh chlorid of lime (bleaching 

 powder) in 1 qt. of water. This should be placed in a tightly stoppered bottle 

 and kept away from light. To disinfect water, add one teaspoonful of the 



