RURAL ENGINEERING. 289 



" Every precaution should be taken to protect mature stock against infection 

 by the white diarrhea bacillus. It is, therefore, important that mature hens, 

 as well as growing stock, be kept in good clean houses and large yards; that 

 they receive wholesome food and the best of care. Finally, that they be not 

 allowed to come in contact with infected chicks or mature stock." 



EXJRAL ENGINEERIlira. 



Civil engineers* pocketbook, A. I. Frye (New York and London, 1913, pp. 

 XLII-\-1611). — This is a reference book for engineers, contractors, and students 

 and contains rules, methods, useful data, formulas, and a large number of 

 tables. 



Irrigation pocketbook or facts, figures, and formulas for irrigation engi- 

 neers, compiled by R. B. Buckley (London, New York and Calcutta, 1911, pp. 

 419, figs. 71, pi. 1). — This handbook is a compilation of accepted facts, data, 

 and formulas bearing on the everyday work of the irrigation engineer, which 

 have been drawn from British government reports, publications of leading engi- 

 neers, and the proceedings of engineering societies in England, Ireland, and 

 the United States. 



Ninth biennial report of the state board of irrigation, highways and 

 drainage (Bien. Rpt. Bd. Irrig. Nehr., 9 (1911-1912), pp. 262, pis. 35, figs. 8).— 

 This is a report of the irrigation, drainage and highway operations in Nebraska 

 during 1911-12, containing a large amount of stream measurement data, notes 

 on claims and applications for water, and a progress report on the construction 

 and maintenance of highways. Several detailed plans of the larger highway 

 structures are included. 



Seepage losses in irrigation systems, E. G. Hopson (Sci. Amer. Sup., 75 

 (1913), No. 193J/, pp. 56-59, figs. 22; Engin. Neivs, 69 (1913), No. 13, pp. 618- 

 623, figs. 7). — Data on evaporation and seepage losses from 4 large reservoirs 

 and on the total losses from reservoirs, main ditches, and laterals of 6 irriga- 

 tion projects of the United States Reclamation Service in the northwestern 

 United States are given. 



Canal linings and the use of pipe to prevent the loss of irrigation water are 

 described, and figures are given showing the ultimate economy of lined as 

 compared with unliued canals. It is concluded that as an engineering and 

 business policy the protection of canal systems from seepage losses is worthy 

 of consideration in all construction and operation, and in the extension of those 

 irrigation works already constructed. 



Earth reservoir dams, A. A. Meyers (Aarden Rescrvoirdamm.cn {A^nster- 

 dam, 1911], pp. VII+90, pis. 21, figs. 10; Arch. Suikerindus. Nederland. Indie, 

 Bijlagc). — This book deals with the construction of earthen dams for irrigation, 

 water power, and water supply. It contains chapters on the applicability of 

 earthen dams, their principal types, materials used in their construction, meth- 

 ods of examining the qualities of available building material, use of different 

 earths as material, the puddle core, core walls, sluiced reservoir dams, drain- 

 age, foundations, determining the thickness of the dam, wave action on earthen 

 dams, construction, cost of preparing the ground, closing the dam, and slips 

 and breaks. 



Yakima Indian Reservation drainage project, J. W. Martin (Engin. Neios, 

 69 (1913), No. 8, pp. 3//J-3//7, figs. //).— Overuse of irrigation water having 

 turned productive farms on the Yakima Indian Reservation, Wash., into 

 swamps and barren alkali flats, a drainage system comprising 218,839 ft. of 

 canals and laterals was constructed to tap the underlying bed of gravel. This 

 experiment, it is stated, has proved successful in reclaiming the waste laud. 



