Se ims San 
eee ee 
J. P. Kimball on the Silver Mines of Sta. Hulalia, Mexico. 171 
of the arroyo immediately below the mouth of the mine, an 
from which it would be practicable to reach its workings. The 
hors 
The Negrita Chiquita is a newer open working, now operated 
by Don Jesus Mateos, and occupying strata but a little lower than 
the mouth of the shaft of the Negrita Grande. The Carmen 
occupies beds somewhat higher, and is a similar cavernous exca- 
vatio 
tion. 
_ It will be understood that notwithstanding wide differences 
in topographical level, all the workings above mentioned are 
embraced within the same ‘set of beds whose combined thick- 
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. : ound of E and the large returns which 
| these have afforded, its future prospects seem scarcely impaired 
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seeming to have been all that was necessary. Besides the great 
amount of unbroken ground left in and amidst the established 
prosecuted by an enlightened practice. | ie 
| odd Wi notedncaterige * the judgment of the miners 
who are very expert in the detection of familiar ores, the ores 
$51.60 per ton of 2000 Ibs. Four-ounce ores are abundant in 
all of : cae but ae pay for working by the present 
elting practice. By care in selection, this grade is easily 
