RURAL ENGIXEERING. 89 



need not be feared except where the soil is clayey or already impregnated with 

 alkali." 



As regards (he adequacy in quantity for irrigation of the water supplies " the 

 danger of exhausting the supply is believed to be so remote that it need not 

 prevent anyone from making developments that will otherwise be profitable." 



The items to be included in estimating the annual cost of irrigation are 

 enumerated and it is thought " that with good management, both in regard 

 to pumping and in regjird to agricultural or horticultural practice, irrigation 

 can be made profitable for raising vegetables and certain fruits and probably 

 also alfalfa and some other field crops. . . . [However] because of the lack 

 of quantitative knowledge as to the increase in crop values that will in the 

 long run result from irrigation, this movement should be prosecuted with con- 

 servatism and developments should be made only after deliberate cousiderti- 

 tion of all the factors involved." 



A bibliogi'aphy is appended. 



The diversion of irrigating water from Arizona streams, A. L. Harris 

 {Pr<jc. Amcr. Soc Civ. Engin., JfO (WJJf), No. 1, pp. 39-5S, figs. 5).— This paper 

 deals w'ith the principal features in the author's experience in the design of 

 diversion works for both government and private irrigation projects in Arizona. 

 The chief points discussed are the design of diverting dams and gates. 



Hydraulic power in the Alps region, R. de la Brosse et al. {Min. Agr. 

 [Fr<i)ice], Serv. Grandcs Forces llydraul. Region Alpes, Result. Etudes et Trav. 

 // (i.9/0), pp. 556, pis. 6, figs. 14; Sups. I, pis. S; II, pis. 33; 5 (1911), pp. 530, 

 pi. 1, figs. 4; Sup., pis. 8; 6 {1911), pp. 49J,, pi. 1, figs. U,, Sup., pis. ////).— This 

 report deals with the hydraulic resources of the Alr)S for both power and irri- 

 g:ition, and contains a large amount of hydraulic and hydrographic data. 



Comparative studies of problems of agricultural hydraulics in Java, 

 British India, and Indo China, A. 2sormand[n (Bui. Econ. Indochine, n. ser., 

 16 (1918), No. 104, PP- 784-810). — This is a comparative study of economic 

 problems, more particularly of the irrigation and drainage of lands in Java, 

 British India, and Indo China, taking up particularly the nece.ssity of irrigation, 

 finished and projected work, duty of water, irrigation by pumping, general irri- 

 gation investigations, and the several phases of drainage. It is concluded that 

 the works of agricultural hydraulics projected in Indo China will probably be 

 neither excessive in cost nor a source of direct benefit, and that the benefit 

 derived will in no way compare with the benefits derived from similar works 

 executed in British India. 



Drainage and irrigation. — Management of irrigation systems, R. S. 

 Stockton (Engin. and Contract:. 41 (1914), No. .'/, pp. 141-150, figs. 11). — This 

 article expresses opinions and ideas " resulting from some years of observation 

 and experience in connection with the construction, operation, and mainte- 

 nance of irrigation systems with especial reference to the viewiwiut of the 

 management." 



The selection and cost of a sm.all pum.ping plant, B. A. Etcheverry (Cali- 

 fornia Sta. Circ. Ill (1914), PP- 30, figs. 8). — This bulletin contains in addition 

 to matter previously noted from other sources ( E. S. R., 28, pp. S3, 484 ; 30, p. 

 485), brief discussions of types of pumping machinery, including the air-lift 

 pump and hydraulic ram. A bibliography of related works is appended. 



The discharge capacity of semicircular steel flumes, E. A. Moritz (Engin. 

 News, 11 (1914), No. 4^ PP- 192-195, fig. 1). — The author computes mathemati- 

 cally the discharge capacity of semicircular steel flumes, and gives tables of the 

 discharges and corresponding velocities for standard sizes calculated by the 

 Kutter formula for values of n of 0.012 and 0.01-5, which he states correspond 

 to the smoothest and roughest flumes, respectively. The tables are based on a 



