156 



Bulletin 80 



in low-grade sulphide ores (No. 3491, No. 3303), and to nearly 

 one-half in the richer oxidized ores (No. 3492, No. 3304, No. 

 3439). By far the larger portion of tailings produced, however, 

 are from low-grade sulphide ores, the wastes from which there- 

 fore predominate, formerly imparting to river waters the whitish 



TABLE III 

 Dissolved Copper in River, Irrigating, and Ground Waters below the 



Clifton-Morenci District 



Sample No. 

 and date 



34.38 



June 28, '05 



3439 

 June 28, '05 



3309 

 May 26, '04 



3486 

 June 11, '05 



3622 

 June 25, '06 



3737 

 Feb. 22, '07 



Tailings 

 4011 

 Jan. 3, '09 



4029 

 Apr. 12, '09 



6342 

 Mar. 4, '16 



3986 

 Jan. 2, '09 



Records of 

 Cananea 

 C. C. Co. 

 Jan. 4, '14 



3504 

 Aug. 19, '05 



4012 

 Jan. 3, '09 



3526 



Condition and 



amount taken 



in cc. 



500 



Description of sample 



Water mixed with sulphide tailings 



from A. C. Co. 's mill, Clifton 



Water mixed with oxidized tailings 



from A. C. Co. 's mill, Clifton 500 



Montezuma Canal water at Solo- 



monville; slight rise in river 2000 



Montezuma Canal at Solomonville, 



small flood 6000 



Montezuma Canal at Solomonville, 



head waters clear 9000 



Montezuma Canal at Solomonville, 



medium flood 14000 



shut out of water supply May 1, 1908. 



Water from Montezuma Canal at 



Solomonville 4000 



Montezuma Canal at Solomonville 3700 



Montezuma Canal at Solomonville, 



high water 1000 



Water from C. & A. Ditch, Bisbee 



mine waters 3500 



Water from creek below concen- 

 trator 



Water from Geo. Olney's well, 30 ft. 

 deep, east of Safford, under 

 Montezuma Canal 7000 



Water from Wilson's well, one-half 

 mile west of Solomonville under 

 San Jose Canal 3500 



Water from University well, Tuc- 

 son, 95 ft. deep, tapping Rillito 

 underflow 7000 



Cu 

 found, 

 grams 



.0009 



.0018 



.0016 



.0015 



.00095 



.0403 



.00031 

 .0003 



.00003 

 .00039 



.0037 

 less 

 than 



.00001 



none 



Cu 

 p.p.m. 



1.80 



3.60 



.80 



.25 



.11 



2.88 



.08 

 .08 



.03 

 .11 



2.1 



.53 



less 



than 



.003 



none 



appearance characteristic of this material. It is of interest to 

 note in this connection that in one instance observed the tailings 

 almost completely maintained their richness in copper between 



