1916] RTTBAL ENGINEERING. 885 



unrefined cholera serum. The globulin was found to protect against natural 

 exposure and artificial infection (1 to 5 cc. virus) in doses of 0.2 cv. pn- pound 

 weight. On account of its concentration the globulin may be used in much 

 smaller doses and thus offers the advantage of reducing tlio lal)()r of adminis- 

 tration. " It seems reasonable to assume that a small immunizing doso is 

 absorbed more rapidly by the animal as the units of value are more quickly 

 available." Being a sterile product, it is found more desirable fur use than 

 the unrefined serum. 



Hog cholera in Pennsylvania, R. M. Staley (Penn. Live Stock Sanit. Bd. 

 Circ. JfS (1916), pp. 13). — This bulletiu discusses the distribution, symptoms and 

 lesions, cause, methods of spreading the disease, treatment, prevention, and the 

 serum-virus and serum-alone treatments. Regulations with reference to hog 

 cholera adopted by the State Live Stocli Sanitary Board to protect and encour- 

 age the swine industry of Pennsylvania are included. 



The maintenance of virulence of Bacillus abortivus equinus, E. S. Good 

 and W. V. Smith (Jour. Med. Research, 33 (1916), No. S, pp. Jf93-J,98) .—In a 

 study of the virulence of certain cultures of B. abortivus equinus, it was found 

 that the intravenous inoculation of a mare with 1 cc. .>f a mixed culture of the 

 organism which had been grown in the laboratory at the Kentucky Experiment 

 Station for from 10 to 30 generations and for from one and a half to four 

 years caused a typical abortion. Previous tests of the animal's blood showed no 

 immunity to the disease. At the time of inoculation the animal was protected 

 with 200 cc. of a hyperimmune serum which possessed marked bacteriolytic 

 properties. 



The intravenous inoculation of 0.1 cc. of 24-hcur broth cultures produced 

 death in rabbits in from two to four days, and the subcutaneous inoculation of 

 1 cc. of a broth culture produced abortion in guinea pigs in four days and 

 seventeen days. The organism producing these effects was in each instance 

 isolated from the animal after death. 



Contagious epithelioma in chickens (chicken pox, swelled head). — Its con- 

 trol by vaccination, W. B. Mack and E. Records (Nevada Sta. Bui. 84 (1916), 

 pp. 3-32, figs. 19).— A. popular abstract of Bulletin 82 (E. S. R., 34, p. 189) 

 amplified and illustrated. 



RTTEAL ENGINEERING. 



Oflacial proceedings of the Twenty-first International Irrigation Congress 

 held at Calgary, Alberta, Canada, October 5-9, 1914 (Off. Proc. Internat. 

 Irrig. Cong., 21 (19U), pp. XXVni+402, pis. 9, figs. 3/).— These proceedings 

 contain the following special articles bearing on the subject of irrigation: 

 Failure of Irrigation and Land Settlement Policies of the Western States, 

 Water Storage and Distribution by the United States Reclamation Service, 

 The Dominion Government Laws Respecting Irrigation in Western Canada, 

 Colonizing in Western Canada, British Columbia Irrigation Policie.s, The 

 Necessity^of a Higher Duty of Water, Farm Development in the Arid West, 

 Administration of Water Rights in British Columbia, Irrigation and Saskatche- 

 wan Agriculture, Relation of the Farmer to the Irrigation Project, Irrigation 

 in Alberta and the Settler on Irrigated Land, Some, Irrigation Problems in 

 Texas Recent Irrigation District Legislation in California, Irrigation Enter- 

 prises' of the Canadian Pacific Railway Company in Alberta, Storage and 

 Power Possibilities of the Bow River West of Calgary, The Great Falls Plan 

 of Cooperation between the City and Farming Community. Silt Problems of the 

 Colorado River, and Irrigation Conditions in the State of Washington. 



