418 EXPERIMENT STATION RECOED. 



Report of water resources investigation of Minnesota, 1909-10 {St. Paul. 

 Minn.: HUitc Drain. Com., 1910, jrp. 3.'/7, pis. 6'6).— This is tlio first bieunial 

 report of the State Drainage Commission, organized under authority of a joint 

 resolution of the state legislature, approved April 20, 1909, and contains re- 

 ports by George A. Italph, chief engineer of the State Drainage Commission, 

 and Robert Follansbee, district engineer, U. S. Geological Survey. These re- 

 ports deal with cooperative work of the State Drainage Commission and the 

 U. S. Geological Survey, and include " measurements of the flow of water in 

 nearly all of the important streams of the State; surveys, maps, and profiles 

 of nearly 1,000 miles of rivers; evaporation records at five stations in this 

 section of the United States; the preparation of a rainfall map showing the 

 distribution of rainfall throughout the State; the preparation of a watershed 

 map of the State, showing all principal drainage areas and a statement of 

 square miles contained in all principal and subdrainage areas in the State; 

 the collection of a vast amount of data relative to power development and 

 the regulation and control of water resources in other States and European 

 countries; [and] the draft of a proposed law for the creation of a water supply 

 commission, and regulating and controlling the use of the waters of the State." 

 Surface water supply of the Lower Mississippi basin, 1910, W. B. Free- 

 man and J. G. Mathers (U. 8. Geoh 8i(rvey, Water-Siipphj Paper 287, pp. 91, 

 pls^ 2), — This paper, one of the series on stream measurements in the United 

 States, describes this basin, and gives the results of measurements of flow of 

 the principal streams therein. 



Surface water supply of the Missouri River basin, 1910, W. A. Lamb 

 ET AL. (V. 8. Geol. Survey, Water-8tipp1i/ Paper, 286, pp. Til +308, pis. .}, fig. 

 1). — This is one of the series of volumes reporting results of measurements 

 of the flow of certain streams in the United States, and deals wnth measure- 

 ments of the Missouri River and its principal tributary streams. 



Surface water supply of western Gulf of Mexico, 1910, W. B. Freeman 

 and J. G. Mathers (U. 8. Geol. Survey, Water-Supply Paper 288, pp. U9, pis. 

 3, fig. 1). — This is one of the series of reiwrts on measurements of stream 

 flow in the United States, and gives the results of measurements in the drain- 

 age basins of the Brazos, Colorado (in Texas), and Rio Grande. 



Underground waters of the southern border of the Valley of Mexico, J. D. 

 ViLLARELLo and J. S. Agraz {Bol. Inst. Geol. Mexico, 1911, No. 28, pp. 89, pis. 

 13). — This is a report on the hydrology of this region, including observations on 

 the Jimount and composition of the underground waters. 



The analysis of water for household and municipal purposes, ft. M. Chamot 

 find H. W. Redfield {Itliaea, N. Y., 1911, pp. 130, jigs. .',).— This is stated to be 

 the first of a series of small treatises dealing in an elementary way with the 

 methods used in the laboratoi-y of sanitary chemistry of Cornell University for 

 examination of water and food. The subject matter is devoted to laboratory 

 methods mainly, and is intended to supplement the lecture courses in sanitary 

 chemistry. 



The influence of storage and various preservatives upon the dissolved 

 oxygen in waters, A. Lederer {Jour. Amer. Puh. Health Assoc., 1 {1911), No. 

 10. pp. UiO-l-'iG). — From his study of this subject, the author concludes that 

 " the percentage reduction of dissolved oxygen in waters which are stored in 

 tightly closeil bottles and exposed to a constant temperature for a definite length 

 of time, constitute a fair index of pollution. To unpreserved samples of pol- 

 luted waters, the reagents for the determination of the dissolved oxygen must be 

 added on the spot to avoid a reduction. . . . The addition of 1 cc. of 40 per 

 cent formaldehyde solution to a sample of water, even if badly polluted, will 

 preserve the amount of dissolved oxygen present for at least 2 days at 



