RURAL ENGINEERING. 279 



Transmission of Spirochaeta gallinarum by mites, M. Mayer {Arch. 

 Schiffs M. Tropen Ilyg., IS (191.'/), No. 7, pp. 25^, 255; abs. in Bui. Inst. Pasteur, 

 12 (1914), No. 10, p. 4Jf2). — At the Hamburg Institute of Tropical Diseases 

 where a spirochete virus is preserved in canaries the disease has often been 

 observed to spread from cage to cage. Investigations have led to the conclu- 

 sion that mites {Dennanyxsu.s sp.) may at times be agents by which the disease 

 is spread. 



RURAL ENGINEERING. 



Irrigation investigations, F. .\dams (Calif ornia Sta. Rpt. 1914, PP' 124- 

 127, figs. 2). — Irrigation experiments in 1913, carried on in cooperation with 

 this Office and the State Department of Engineering, show that up to a certain 

 point crop yields increase quite consistently with increasing amounts of irri- 

 gation water, after which in some cases they decrease. Soil moisture determi- 

 nations made before and after irrigations indicate the care which is desirable 

 in the use of water, and show that a large part of the water applied, even under 

 what are generally considered good methods of practice, percolates below the 

 zone of observation which, except with alfalfa, is usually the chief zone of root 

 growth. 



Profile surveys in the basin of Clark Fork of Columbia River, Montana- 

 Idaho-Washington, R. B. Marshall et al. (U. 8. Oeol. Survey, Water-Supply 

 Paper 346 (1914), pp. 6, pis. 22). — A number of profile maps of these surveys 

 are given. 



Profile surveys in Snake Eiver Basin, Idaho, R. B. Marshall et al. 

 {V. 8. Geol. Survey, Water-Supply Paper S'/7 (1914), pp. 12, pis. 37).— This 

 report describes the general features of the Snake River Basin and gives a large 

 number of profile surveys made in the basin. 



The Snake River Basin is said to have many feasible storage sites, few of 

 which have been developed. "Irrigation has reached a high stage of develop- 

 ment in the Snake River Valley, yet approximately 6,000,000 acre-feet of water 

 annually runs to waste. Eventually these flood waters will be stored and used 

 to irrigate thousands of acres of arid land." 



Surface water supply of Colorado River Basin, R. Follansbee, E. A. 

 Porter, and H. D. Padgett (U. S. Geol. Survey, Water-Supply Paper 329 

 {1914), pp. 238, /J?s. 2). — This report presents the results of measurements of 

 flow made on the Green and main Colorado Rivers, New Fork River, Big 

 Sandy Creek, Yampa River, Ashley Creek, Duchesne River, White River, 

 Price River, San Rafael River, Grand River, Dolores River, Fremont River, 

 Escalante River, San Juan River, Virgin River, Bill Williams River, and Gila 

 River basins in 1912. Tables give daily gage heights and daily and monthly 

 discharges at each station. 



Surface water supply of the Missouri River Basin, 1912, W. A. Lamb, R. 

 Follansbee, and 11. D. Padgett (U. 8. Geol. Survey, Water-Supply Paper 326 

 {1914), PP- 575, pis. 2). — This report presents the results of measurements of 

 flow made on the Missouri River and its tributaries during 1912. Daily gage 

 heights and dally and monthly discharges are given for each station. 



Deschutes River, Oregon, and its utilization, F. F. Henshaw. J. H. Lewis, 

 and E. J. McCaustland {U. 8. Geol. Survey, Water-Supply Paper 844 (1914), 

 pp. 200, pis. 43, figs. 8). — ^This report, prepared in cooperation with the State 

 of Oregon, describes the general features of the Deschutes River Basin, pre- 

 sents the results of measurements of stream flow made in the basin, and deals 

 in more or less detail with such related subjects as economic distribution of 

 water, quality and availability of the water supply, developed and undevel- 



