Mar. 1899. Tue Ores or CoLompra—NICHOLS. 169 
this town come also specimens of a quarter-inch seam of cinnabar in 
mica schist. The town Anaime, near the river of the same name in 
the Department of Cauca, although not very far distant, does not 
appear to be the place referred to here. From Anaime Sefior Gamba 
secured the following specimens: 
pata. | 1137.) schist, wall rock in the Recreo mine, 
Anaime.” 
This specimen is a mica schist with pockets and seams of calcite 
and with large isolated pyrite crystals scattered through it. 
“4r5. Quartzose ore from the Recreo mine.”’ 
‘416. Quartzose ore from the Recreo mine.” 
‘‘ar7. [E 1138.] Quartz with fahlerz (tetrahedrite), ore from the 
Recreo mine.”’ 
A clean white quartz with nodules of tetrahedrite from one-half 
to one inch in diameter. 
“418. Syenite from the Bolivar mine.’’ 
Though the specimen of this number is not in the collection, 
there is little doubt but it is the same rock as the following specimen, 
z. é., rhyolite tuff. 
‘ato. Syenite from the Bolivar mine.”’ 
‘©420. [E 1139.] Decomposed rich ore from the Bolivar mine, 
Anaime.”’ 
This is a comparatively fresh rhyolite tuff. As nine grams when 
tested did not yield even so much as a trace of the precious metals, 
there is some mistake about this specimen. It is probably specimen 
number 418, ‘‘syenite.”” It is a very acid rock even for rhyolite and 
contains, according to an analysis by the writer, 78.97% silica. 
‘421. Arsenical pyrites, ore from the Bolivar mine.”’ 
‘«422. [E 1210.] Cinnabar, mercury ore from Anaime.” 
‘¢423. [E 1211.] Cinnabar, mercury ore from Anaime.”” Like 
No. 422. 
These specimens are a quarter-inch vein of bright, crystalline 
cinnabar in mica schist. The vein lies in the plane of lamination of 
the schist. 
‘¢424, Cinnabar, mercury ore from Anaime.”’ 
‘‘425. Native copper from Natagamia.”’ 
A mass which weighs eleven pounds. Natagamia, a place of 9,000 
inhabitants, on the west bank of the Magdalena river, is the geograph- 
ical center of Tolima, Native copper is said tooccur at the Frontino 
mines of Antioquia, and there are accounts which, however, need con- 
firmation, of copper ores in a number of places. 
