1919] EURAL ENGINEERING. 379 



as small doses as 1 cc. The intravenous Injection of virulent blood obtained 

 from producing animals after a series of passages and a niinimum period of 

 incubation of about 70 hours did not result in the development of the disease, 

 provided the dose did not exceed about 30 cc. 



The treatment recommended as a result of this study is a series of three 

 intravenous injections of virulent blood in doses of 25, 30, and 45 cc, respec- 

 tively. The first iuoculatiou is said to be followed an hour or tvpo later by a 

 rise in temperature, which persists for 8 or 10 hours. The fever is less marked 

 after the second and often insignificant after the third inoculation. A period 

 of 10 days should elapse between successive inoculations. A case is reported 

 of the successful immunization of two cows by this method. 



Eesearches on ulcerous lymphangitis, R. Van Saceghem {An7i. M4d. V6t., 

 64 (1919), Xo. S-Jf, pp. S0-S3). — The author has used with success for the treat- 

 ment of ulcerous lymphangitis in its early stages subcutaneous inoculation of a 

 pure culture of the bacilli of Preisz-Nocard. It is emphasized that this treat- 

 ment should be begun as early as possible in the disease, before sensitization 

 to the bacilli has taken place and extensive lesions have been produced. 



Treatment of ulcerous lymphangitis, R. Van Saceghem (Ann. Med. V6t., 64 

 {1919), No. 3-4, PP- 83-86). — The method noted above is being employed to im- 

 munize against future attacks horses which have been cured of ulcerous lym- 

 phangitis. 



A progress report on Sarcocystis tenella. — II, Seasonal infection, J. W. 

 Scott {Wyoming Sta. Rpt. 1918, pp. 95-116). — This continuation of earlier work 

 (E. S. R., 34, p. 658) has been noted from another source (E. S. R., 40, p. 585). 



RURAL ENGmEERIIfa. 



Irrigation investigations, G. E. P. Smith and A. L. Enger {Arizona Sta. Rpt. 

 1917, pp. 481-491, fio-s. 2). — In continuing the irrigation investigations (E. S.. R., 

 39, p. 792), in the Casa Grande Valley, measurements of seepage losses have not 

 confirmed those of the previous year, but w^ater table fluctuations, including the 

 special observations in the vicinity of active pumping plantts, have confirmed 

 results previously reported. 



Deep well drilling in the Lower Gila Valley, in which the depth of drilling 

 was increased, has revealed an extensive aggregate potential water supply, 

 which is considered important from the standpoint of further development but 

 is thought to be confined to the bottom lands. Evaporation studies made in 

 three localities of widely different climatic conditions but under approximately 

 similar soil conditions showed in all three locations a close agreement between 

 temperature and evaporation, which is, however, modified by wind movement. 

 " lieduced to the lowest terms, the evaporation-rate depends upon temperature 

 and the vapor pressure directly at the water surface." 



An investigation of machine-made cement pipe for use in irrigation lines leads 

 to the conclusion " that pipe-making by machinery is entirely practical, that 

 the pipe is much superior in quality to handmade cement pipe and that the cost 

 is less. . . . For the larger laterals and main canals cement lining is the best 

 method of improvement. Careful estimates show that by lining the canals of 

 the Salt River ^'alley enough water will be saved to permit an increase of 25 

 per cent in the project area." 



A tabular summary of the station pumping plants is given. 



The Tempe drainage ditch, A. E. Vinson and C. N. Catlin {Arizona Sta. Rpt. 

 1917, pp. 474-476). — Analyses of samples of water from the Tempe drainage 

 ditch are reported. 



