170 J. P. Kimball on the Silver Mines of Sta. Eulalia, Mexico. 
Several openings in the north bluff have been made at higher 
levels. One, the Cuartillera, is at the height of some 3800 feet 
above the bottom of the cafion. It furnishes a non-ferruginous 
ore of a drab color. 
this mine and the Guadalu steadily yield plumbiferous 
ores, carrying, mostly in an invisible form, chlorid, bromid 
and sulphids of silver. 
_ The other mines of this group are all on the left flank of the 
limestone ridge. They are the Santa Rita, San Francisco, 
Purisima, Negrita Grande, Negrita Chi uita, and the Carmen 
_ The Santa Rita, one of the oldest and more reputable mines, 
1s a shelving excavation, starting in fossiliferous limestone, 
some 850 ft. above the bed of the Dolores arroyo. large 
burrow of ferruginous material indicates the extent of former 
workings. The main opening is said to be asphyxiated, and 
is now closed, though containing, according to all accounts, ores 
running as high as four mares to the carga ($250 to the ton). 
‘The Purisima, occupies nearly the same level as the Santa 
