EUKAL ENGINEERING. 385 



strated. The pathogenic importance of the parasite renders it necessary to 

 administer anthelmintics to the horses infected with it." 



Investigations of the action of " 606 " on spirochetosis of fowls, A. Haueb 

 (Centbl. Bakt. [etc.], 1. Abt., Grig., 62 {1912), No. 6, pp. 477-496) .—The author 

 finds that Salvarsan destroys spirochetes in fowls, its curative action being 

 noticed as early as the day of administration. A bibliography of 31 titles is 

 appended. 



RURAL ENGINEERING. 



The primer of hydraulics, F. A. Smith (Chicago, 1911, pp. VI-\-217, figs. 

 108) .—Thin publication covers the more important mathematical, physical, and 

 mechanical principles underlying the subject of hydraulics, and gives general 

 information, formulas, and hydraulic tables to solve problems relating to the 

 flow of water in channels in municipal, drainage, irrigation, or other hydraulic 

 works. 



Tables for converting' discharge in second-feet per square mile into run-off 

 in depth in inches and discharge in second-feet into run-off in acre-feet 

 (U. S. Geol. Survey, 1910, pp. 21). 



A review of masonry dam design and construction illustrated with cross 

 sections of 40 notable dams (Engin. and Contract., 37 (1912), No. 21, pp. 

 5S3~^9Jf, figs. //7). — Brief descriptions of the design and construction of these 

 irrigation and power dams are given with statements of cost. 



Fourth biennial report of the state engineer and of the Carey Land Act 

 Board of the State of Montana, 1909—10, J. W. Wade (Bien. Rpt. State Engin. 

 Mont., 4 (1909-10), pp. 18). — This report makes a brief statement of work by 

 the Montana state engineer's office in 1909-10, and discusses the physical and 

 financial condition of irrigation projects under the Carey Act in Montana in 

 1910. 



Tenth biennial report of the state engineer of Wyoming, 1909—10, C T. 

 Johnston (Bien. Rpt. State Engin. Wyo., 10 (1909-10), pp. 211, pis. 9, fig. 1).— 

 This report deals with the irrigation administration in Wyoming in 1909-10, 

 gives lists of permits to appropriate irrigation water, tables of stream gagings, 

 reports of superintendents of water divisions, and reports of the progress of 

 reclamation works in the State. 



Review of irrigation in India in 1909—10, W. B. Gordon (Sup. Gaz. India, 

 1911, June 10, pp. 1099-1121). — Tabulated data are reported showing the 

 financial and other results of irrigation works in operation in India in 1909-10. 

 The total area irrigated was about 22,500,000 acres, and the value of the crops 

 raised thereon is estimated at about 116 per cent of the capital outlay. 



Volume of water required in irrigation, M. Ringelmann (Rev. Hort. [Paris'], 

 S// (1912), No. 7, pp. 160-162).— It is stated in this article that the soil char- 

 acteristics, the nature and age of the vegetation, and existing meteorological 

 conditions largely govern the amount and frequency of irrigation required. 

 The results of observations along these lines are given from different sources. 



The use of slope-stake tables in irrigation work, R. C. Pierce (Engin. News, 

 67 (1912), No. 21, pp. 986, 587).— The author exi^lains the use of tables giving 

 the distances out to the cut and fill stakes and the corresponding cuts in cross- 

 sectioning irrigation ditches. The process, he claims, eliminates the errors in 

 the mental calculations of the rodman and tapeman, reduces talking and signal- 

 ing to a minimum, and saves time. 



[An irrigation pumping plant], C R. Sessions (Pacific Rural Press, 8S 

 ,(,1912), No, 20, p. 467, fig. 1). — ^A simple and economical irrigation pumping 



