244 



Journal of Agricultural Research 



Vol. X. No. s 



Table XV. — List of river-bed materials avalyzed 

 [Numbers refer to those given on diagrams and in other tables) 



feample 

 No. 



River and location. 



Collector of sample. 



i6 



South Platte, Denver, Colo., intersection of river and 



Yale Street, screened through y^-mch. revolving. 



North Platte, south of Mitchell, Nebr 



Cache la Poudre, Colo., 300 feet W. of E. line of sec. 



3, T. 7 N., R. 69 W., on an island. 

 Cache la Poudre, just below Bellvue Bridge, sec. 30, 



T. 8N., R. 69 W. 



Cache la Poudre, Windsor, Colo 



Cache la Poudre, Greeley, Colo 



South Platte, i mile above mouth of Cache la Poudre, 



South Platte, at Evans, Colo 



South Platte, at river bridge south of North Platte, 



Nebr. 

 Cherry Creek, intersection with Steele Street, Denver 



Arkansas, at Avondale, Colo 



Rio Grande, i^ miles west of Mesilla, N. Mex , 



Salt, near Mesa, Ariz 



Colorado, Imperial Canal intake 



Santa Ana, Riverside, Cal., above West Riverside 



Bridge. A large part of this came out of L3^Ie 



Canon, winter 1915-16. 



Santa Ana, southeast of FuUerton, Cal 



San Joaquin, Cal 



Sacramento, Princeton, Cal 



Sacramento, Calusa, Calusa County, Cal 



Feather, N. line sec. 4, T. 18 N., R. 3 E., Mount 



Diablo base and meridian, Cal. 

 Feather, S. line sec. 9, T. 16 N., R. 3 E., Mount 



Diablo base and meridian, Cal. 

 Columbia, i mile below mouth of Snake, near Bur- 

 bank, Wash. 

 Umatilla, % mile below Maxwell diversion dam, 9 



miles from mouth of river, Oreg. 

 Umatilla, % mile above Maxwell diversion dam, 10 



miles from mouth of river, Oreg. 



Yakima, near Grandview, Wash 



Yakima, near Toppenish, Wash 



Sevier, Utah 



Commercial. 



H. C. Diesem. 

 R. G. Hemphill. 



Do. 



Carl Rohwer. 



Do. 



Do. 



Do. 

 H. C. Diesem. 



Commercial. 



J. M. Murtha. 



D. W. Bloodgood. 



P. E. Fuller. 



F. J. Viehmever. 



W. W. McLaughlin. 



Do. 

 R. D. Robertson. 

 Charles Kaupke . 



Do. 

 H. S. Patton. 



Do. 

 E. M. Chandler. 

 P. S. Jones. 



Do. 



J. G. Heinz. 



Do. 

 L. M. Winsor. 



A mechanical analysis of each sand was made. The screens used v.^ere 

 standard 8-inch diameter, of the following sizes, or mesh per inch: 

 1,4, 12, 16, 20, 30, 40, 50, 60, 80, and 100. At least three i,ooo-gm. runs 

 were made on each sample, and in case of any practical variation the 

 entire 20-pound I'ot was screened. The screens were handled by means 

 of a mechanical shaker (23), and the percentage of voids was obtained 

 by the usual water method. Table XVI gives the complete data of the 

 analysis. The graphical representation of this is shown in figures 

 8 to 10. 



