420 EXPERIMENT STATION RECORD. 



sure, temperature, humidity, precipitation, wind, sunsliine, cloudiness, and 

 casual phenomena during May and June, 1910. The data are briefly discussed 

 in general notes on the weather of each month. 



Evaporinieter records (Florida Sta. Rpt. 1909. pp. XI-XIII). — Weekly obser- 

 vations with 4 evaporimeters placed respectivelj- in an open field, pine woods, 

 on hauiniock soil, and near the water level in a limestone sink are reported. 

 The period of observation extended from July 20, 1908. to June 28. 1909. 



The level of the subsoil water of Cairo, A. Lucas (Surveu Xotes [E(/ijp1]. 

 1 {1901), No. 6, pp. 19Ji-199; Cairo Sci. Jour.. 2 (1908). Xo. 2Ji, pp. 311-313; 3 

 (1909), Xo. 28, pp. Jf-6; 4 (1910), Xo. 43, pp. 0.5-98).— In studies similar to 

 those by Ferrar on the level of the subsoil water in the Delta (E. S. R., 22, p. 

 616). data wei'e obtained which led to the conclusion that there has also been 

 a general rise in the minimum level of the subsoil water of Caii'o. especially 

 during the last 10 years. This was particularly marked in 1900. 



Amount and composition of drainage waters, B. C. Burt and J. W. Leather 

 (Rpt. Caicnpore [India] Agr. i<ta.. 1909. pp. 22-26, figs. .'/).— Additional data 

 obtained with 4 drain gages constructed in 1903 (E. S. R., 21, p. 17) are 

 recorded. 



During the year ended May 31, 1909, the rainfall was 31.53 in. In the two 

 6-ft. gages the percolation was 14.15 in., carrying 102.38 lbs. per acre of nitrogen 

 as nitrates, and 13.95 in., carrying 106.29 lbs. per acre of nitrogen as nitrates, 

 respectively. In the two 3-ft. gages the corresponding percolation was 15.2 in. 

 and 15.72 in., carrying 64.7 lbs. and 57.23 lbs., respectively, per acre of nitrogen 

 as nitrates. 



Surface water supply of the Missouri River basin, 1907—8, R. Follansbee 

 and J. E. Stewart (U. S. GeoL Survey, Wafer-Supply Paper No. 2.'f6, pp. 311, 

 pis. 13, figs. 2). — This report contains the results of flow measurements in the 

 drainage basin of the Missouri River. 



Surface w^ater supply of the Lower Mississippi River basin, 1907—8, W. B. 

 Freeman, W. A. Lamb, and R. H. Bolster (U. *S. Geol. Survey. Water-Supply 

 Paper Xo. 2-'f7, pp. 12'/, pis. 2, figs. 2). — This is. a report of the results of flow 

 measurements at different points in the drainage basins of the Arkansas, Red, 

 and Yazoo rivers, as well as at a few other places in the Lower Mississippi 

 River drainage basin. 



Surface water supply of the Great Basin, 1907—8, E. C. La Rue and F. F. 

 Henshaw (U. S. Geol. Survey, Water-Supply Paper Xo. 250, pp. 151, pis. 6, 

 fig. 1). — This is a I'eport of flow measurements at various places in the Wasatch 

 Mountain drainage area, the Humboldt Sink drainage basin, the Sierra Nevada 

 di'ainage area, and tlie Great Basin drainage in Oregon. 



Surface water supply of California, 1907-8, W. B. Clapp and W. F. Martin 

 (U. S. Geol. Survey, Wafer-Supply Paper Xo. 251, pp. 3(33. pis. 7, fig. 1). — This 

 is a record of stream measurements made in cooperation with the State of 

 California in the lower Colorado River, the Great Basin, South Pacific Ocean, 

 San Francisco Bay. and North Pacific Ocean drainage areas. An article by 

 W. C. Mendenhall on Fluctuations in Ground-water Levels in the Valley of 

 Southern California is appended in continuation of work previously noted 

 (E. S. R.. 19. p. 815). 



The quality of the surface waters of California, W. Van Winkle and F. M. 

 Eaton (U. S. Geol. Survey, Water-Supply Paper No. 237, pp. 11,2, pi. i).— This 

 paper gives the results of a cooperative study by the U. S. Geological Survey 

 and the state engineer of California of " the natural waters of the State of 

 California, their seasonal variation in composition and in physical character- 

 istics, and the damage which they have sustained by reason of pollution." 



