METEOROT.OGY WATER. 



Summary of meteorological observations, 1908. 



517 



Barometer (inches): Mean 



Temperature (°F.): 



Mean , 



Highest 



Lowest 



Greatest daily range 



Least daily range 



Rainfall (inches) 



Number of days on which 0.01 in. or more rain fell 



Mean percentage of cloudiness 



Number of days on which cloudiness averaged 80 per cent or more. 



Last frost in spring 



First frost in fall 



1908. 



30.029. 



49.1 



94.0 (July 12)... 

 -9.0 (Feb. 9)... 

 51.0 (Mar. 2(i).., 

 1.0 (.\pr. 27-30). 



39.17 



121... 



4.7 



G8 



Growing s(>ason 

 (Apr.-Sept.). 



03.1. 



94.0 (July 12). 

 21.0 (Apr. 3). 

 41.0 (Apr. 9). 



21.87. 

 61. 

 4.5. 

 24. 



Apr. 21. 

 Sept. 16. 



Meteorological investig'ations in Surinam, and Curasao, 1909 {Metcorn- 

 logificlic W(t(tniruiiin/(ii, gcdaan op (Ic Mctcorologlftchc Stations in de Kotonirn 

 Surinunie en, Curarao in lict .Janr 1!)!)!). Anixtcrdnni-: (lovf. \J910], pi). ](>).-- 

 Daily and monthly summaries of observations on pressure, temperature, pre- 

 cipitation, humidity, and wind for the year 1909 are reported. 



Rainfall over South. Africa, R. T. A. Innes {Transvaal Dept. Agr., Farmers' 

 Bill. lOJf, pp. 3, map 1). — A map showing approximately the distribution of the 

 rainfall is given and briefly described. 



The relative value of irrigating waters, H. Stabler (Engin. Neics, Gff 

 (1910), No. 2, pp. 57, 58). — The suitability of waters for irrigation with i)ar- 

 ticular reference to alkali content is discussed and an index of irrigating value 

 based upon alkali cnefiicient is given. 



"The alkali coetiicient is a purely arbitrary quantity . . . and may be defined 

 as the depth of water which, on evaporation, would yield sufficient alkali to 

 render a 4-ft. depth of soil injurious to the most sensitive crops." It is based 

 upon the highest concentration of alkali harmless to various forms of vegeta- 

 tion, data for which are given in a table in the article. While the injurious 

 results from the use of a water for irrigation depend largely on drainage condi- 

 tions and soil texture, a water with an alkali coefficient greater than IS is con- 

 sidered good, one from IS to 6 fair, 5.9 to 1.2 poor, and less than 1.2 bad. The 

 waters of various important streams in the United States are classified on the 

 basis of their alkali coefficients as shown in the following table: 



Classification of streams of the United States for irrigation purposes. 



Rio Grande at El Paso, Tex 



Colorado River at Yuma, Ariz 



Salt River at Roosevelt, Ariz 



Gila River at San Carlos, .\riz 



Salt Fork of Red River near Mangum, Okla. . . 



Turkey Creek near Olnstee, Okla 



Pecos River near Carlsbad, N. Mex 



North Fork of Red River near Headrick, Okla 

 Elm Fork of Red River near Mangum, Okla. . 



I Fair. 

 ; Do. 

 Do. 

 Do. 

 Do. 

 Poor. 

 Do. 

 Do. 

 Bad. 



The interference of wells, F. G, Clapp (Engin. Ncivs, 62 (1909), No. 19, 

 pp. J,83-J,S5, figs. 4; abs. in Wasser u. Abwasser, 2 (1910), No. 13, p. 566).— This 

 article treats of the conditions under which deep wells affect other wells in the 

 vicinity. Special attention is given to wells iu sand and gravel, limestone and 



