784 EXPERIMENT STAI lOX liKCOKD. 



uf frum six weeks to three inuiiths. Only adult, stroiit^, ami well-uourisbeil birds 

 recover without serious injury. 



Coccidiosis in poultry and game birds, II. B. Fantuam {Jour. Bd. Agr. 

 l/jjiidon], 21 (JDlo), Xo. 10, pp. HH!>-H'J'J. figs. 2). — A summarized account, in- 

 cluding preventive measures. 



RURAL ENGINEERING. 



Engineering geology, II. Ries and T. L. Watson (Netc York: J. Wiley <t 

 ,Sons, JDlJf, pp. XXyi+672, plv. lOJf, figs. 225). — In an exposition of the funda- 

 mental principles of geology the authors have attempted primarily to emphasize 

 the practical application of the topics treated to engineering work. The book 

 begins with an extensive discussion of petrographic subjects, such as the 

 ])roperties of common rock-forming minerals and the general character, mode of 

 occurrence, origin, structural features, and metamon)bism of rocks. Con- 

 siderable space is devoted to rock weathering, soil formation, and the occur- 

 rence, distribution, and movement of surface and underground waters. Other 

 subjects more closely related to structural engineering which are taken up in 

 more or less detail are landslides: wave action and shore currents; lakes; 

 glacial deposits; building stone; limes, cement, and plaster; clay and clay 

 I>roducts; coal; petroleum, natural gas, and other hydrocarbons; road founda- 

 tions and materials; and ore deposits. 



The principles of irrigation practice, J. A. WroxsoE {Xew York: The ilae- 

 tiiillan Co., 191Jf, pp. A'AT'/-|-//.'*6', figs. 179). — This popular treatise represents 

 an attempt to develop the principles underlying the correct use of water in 

 irrigation for the use of farmers. It contains the following chapters : The 

 meaning of irrigation ; soil moisture ; the soil as water reservoir ; saving water 

 by cultivation ; soil changes due to irrigation water ; conditions determining the 

 use of soil moisture by plants ; the water-cost of dry matter ; crop development 

 under irrigation ; the time of irrigation ; the method of irrigation ; crop com- 

 position; the use of the i-ainfall ; irrigation of cereals; alfalfa and other 

 forage crops and pastures; sugar beets, potatoes, and miscellaneous ci'ops; 

 fruit trees, other trees, and shrubs; the duty, measurement, and division of 

 water; overirrigation and alkali; irrigation in humid climates; Iri'igation 

 tools and devices; the history of irrigation; and permanent agriculture under 

 irrigation 



Underground water resources of the Coastal Plain of Georgia, L. W. Ste- 

 phenson, J. O. Veatch, and R. B. Dole {U. 8. Gcol. Surrcg, Water-Supply 

 Paper 3/fl (1915), pp. 539, pis. 21, figs. 4). — This reixni: embodies the results 

 of studies of the geology and underground water resources of the Coastal Plain 

 of Georgia, the latter being discussed for each county in the area, including 

 various analyses. 



Geology and water resources of Tularosa basin. New Mexico, and adjacent 

 areas, O. E. Meinzer and R. F. Hare (U. 8. Geol. Survey, Watcr-Supply Paper 

 3fi3 {1915), pp. 317, pis. 19, figs. 51). — This report, prepared in cooperation with 

 the New ^Mexico Experiment Station, deals with the physiography, geolog.v, and 

 water resources of an area of approximately 6.0<X) square miles in Xew Mexico, 

 and also takes up in some detail such related subjects as quality of water, irri- 

 gation, and soil and native vegetatiou in relation to water supplies. 



In the valley fill it is stated that supjilies sufficient in quantity for domestic 

 use and for stock can be obtained practically everywhere. In the waters of the 

 valley fill of the northern area there is no sodium carbonate but there are gen- 

 erally large amounts of sodium chlorid and also important amounts of sodium 



