1916] BURAL ENGINEERING. 787 



cal methods ; designing retaining walls of stone or reinforced concrete ; coherent 

 earth; and bin theory. Two appendixes are included on stresses in wedge- 

 shaped reinforced concrete beams and a discussion of experiments on model 

 retaining walls. 



Reports of the Board of Engineers Flood Control to the Board of Super- 

 visors, Los Angeles County, California {Los Angeles: Bd. Engin. Los Angeles 

 Co., 1915, pp. 400 pis. 21, figs. 189).— The text of the report, with maps, plans, 

 specifications, and estimates, is given. 



The laws of Indiana for constructing ditches and levees and on stream 

 pollution and flood prevention, 1915 {Indianapolis, Ind.: State, 1915, pp. 

 368). — The text of the laws is given. 



Surface water supply of Snake River basin, 1913 {U. 8. Geol. Survey^ 

 Water-supply Paper 362— B {1916), pp. 250).— This report, made in cooperation 

 with the States of Idaho, Oregon, and Washington, presents the results of 

 measurements of flow made on the Snalie River and its tributaries during 1913. 



Running water for farm homes, D. Scoates and J. W. Carpenter, Jr. {Miss. 

 Agr. Col. E.xt. Dept. Circ. 6 {1916), pp. 15, figs. 6).— Tfiis is a popular dis- 

 cussion with bills of material for four water-supply systems adapted espe- 

 cially to the needs of Mississippi farms. These vary in approximate cost from 

 $18.40 to $128.80. 



Sources of water pollution, J. W. Hill {Jour. Anier. Water Work.<i Assoc, 

 S {1916), No. 1, pp. 184-191). — The author discusses, from his own experience, 

 the difficulties attending the selection of satisfactory sources of water supplies. 



The latest method of sewage treatment, E. Bartow {Jour. Amer. Water 

 Works Assoc., 3 {1916), No. 2, pp. 327-345, figs. 8).— This is a review of a 

 number of recent reports of experimental work on the subject, many of which 

 have been noted from other sources. 



Sewage purification plants for small country residences and isolated 

 buildings, A. P. I. Cotterell {Jour. Roy. Sanit. Inst., 37 {1916), No. 2, pp. 

 59-69, figs. 5). — The general features of the subject are discussed. 



The utilization of ground waters by pumping for irrigation, G. E. P. 

 Smith {[Tucson, Ariz.: Author, 1915], pp. 31, figs. 7). — The purpose of this 

 paper " is to present in brief compass a survey of modern irrigation pumping 

 and a retrospect of the progi-ess of the past ten years. [It] treats briefly of 

 ground-water supplies, their occurrence, regimen, and recharge ; of the methods^ 

 of developing ground-water supplies by means of wells ; of pumping machinery ; 

 and of the economics of this type of irrigation. It is a discussion of what is, 

 and not of what ought to be; and a mention of new things rather than a de- 

 scription of the old." 



Curves for irrigation-ditch velocity and discharge, L. R. Douglass {Engin. 

 News, 76 {1916), No. 2, pp. 72, 73, figs. 2). — Two sets of curves are given which 

 were prepared primarily for use in irrigation-ditch computation. 



Some studies on the irrigation of citrus orchards, R. S. Vaile {Univ. Cal. 

 Jour. Agr.. S {1916), No. 8, pp. 329-332, figs. S).— Studies of the amounts of 

 water delivered to groves, including a comparison of distribution under various 

 methods of application and culture, are reported. 



It was found that " a very much higher efficiency has been obtained with the 

 overhead irrigation than with the furrow irrigation," but the conclusion drawn 

 from these results " would not necessarily be in favor of overhead irrigation as- 

 a general practice. It would rather be to point out the necessity for care in 

 furrow irrigation." 



Moisture determinations from composite soil samples of the first 4 ft. in 

 clean cultivated and mulched portions of the same orchard showed " that 

 67476°— 17 7 



