408 University of California Publications in AgricvXtural Sciences [Vol. 1 



Clifton and Solomonville. At Clifton, May 23. 1904, the prin- 

 cipal discharge of sulphide tailings (3803) was observed carrying 

 0.93 per cent of copper. At Solomonville, three days later, the 

 Monteziima ditch-water sediments (No. 3309), mostly of this 

 same material, carried 0.86 per cent of copper, indicating the 

 persistence with which the copper accompanies the wastes, with 

 which it is associated, downstream and upon underlying irrigated 

 lands. 



TABLE IV 

 Copper ix Soils Irrigated avith Tailings Waters 



Sample No. 

 and date 



.34.35 



May 2.5, '04 



3434 

 June 10, '05 



3501 

 Aug. 19, '05 



3436 

 Juue25,'05 



.3437 

 June 25, '05 



3502 

 Aug. 19, '05 



2381 

 June 5, '00 



3522 

 Oct. 25, '05 



3521 

 Oct. 25, '05 



2763 

 Nov. 11, '01 



1890 

 Apr. 20, '01 



2830 

 Jan. 19, '00 



Description of sample 



Top 5 in. sedimentary soil (Fred 

 Thorstison), upper end alfalfa 

 field west of Saflford, under 

 Montezuma Canal 



Top 5 in. sedimentary soil (Geo. 

 Olney), upper end alfalfa field 

 east of Safford, under Monte- 

 zuma Canal 



Soil in ])lace at 4 ft. depth beneath 



No. 3434 



Top sedimentary soil (Wm. Gilles- 

 pie), upper end of test alfalfa 

 field west of Solomonville, under 

 Montezuma Canal 



Soil in place, no sediments at sur- 

 face of lower end of field near 

 No. 3436 



Soil in place at 4 ft. depth beneath 

 No. 3437 



Surface 12 in. from garden near 

 Pima, Ariz., bej^ond tailings de- 

 posits 



Top 4 in. sedimentary soil upper 

 end of alfalfa field, Station farm 

 near Phoenix, under Grand and 

 Maricopa canals 



Deep soil, no sediments. Station 

 farm near No. 3522 



Surface 12 in. from orange orchard 

 north of Phoenix, under Ari- 

 zona Canal 



Surface 15 in. from cultivated field 

 west of Tempe, under Temj^e 

 Canal 



Surface 12 in. from orange orchard 

 northeast of Phoenix, under Ari- 

 zona Canal 



Condition and 



weight taken, 



grams 



96.7 

 water -free 



96.8 



water-free 



96.2 



water-free 



96.7 

 water-free 



94 

 water-free 



96.1 

 water-free 



100 

 air-dry 



95 

 water-free 



95 

 water-free 



100 

 air-dry 



100 

 air-dry 



100 

 air-drv 



Cu 

 found, 

 grams 



.020 



.0199 

 .0021 



.0192 



.0028 



.001 



faint 

 trace 



.0003 



.0003 



faint 

 trace 



faint 

 trace 



none 



Cu 

 p.p.m. 



207 



205 

 22 



199 



30 

 10 



trace 



3 

 3 



trace 



trace 



none 



