PRELIMINARY REVIEW OF THE MINING INDUSTRY. 
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of Colorado. Toward the east, and 5,000 feet lower, spread the great plains at the 
foot of the Rocky Mountains; westward the Sangre de Cristo, Collegiate, and Mos¬ 
quito ranges—a snowy and jagged line of ramparts—define the distant horizon. 
A multitude of small mines occupy the southwestern slope of Bull Hill. On 
the northwestern side an area of breceiated granite appears among the volcanic 
rocks, and in this formation is situated the Wild Ilorse mine. This lode, which has 
been worked to a depth of 1,250 feet, has produced over $1,000,000, but is now 
operated only by lessees. A number of smaller producers may be found on the north¬ 
ern slope, toward Cameron, among them the Damon, Jerry Johnson, W. P. Id., and 
Pinnacle. 
Those who have followed this description on a map will have noticed that the 
mines are chiefly situated on the periphery of a circular area, the central part of 
which, comprising the upper part of Squaw Gulch, has thus far yielded very little. 
Few strong veins have been met with in this part of the breccia, but, on the other 
hand, the developments in depth are not extensive. 
On the east and southeast sides of Bull Hill begins that most important belt of 
lodes which extends southward to Victor and includes the richest group of producers 
in the camp. A characteristic feature of this belt is the intrusion into the breccia 
of thick masses of latite-phonolite and syenitic rocks. 
With few exceptions the veins of this belt strike north-northwest. We may 
begin the description with the system of linked veins, 3,000 feet long, covered by the 
Isabella and Victor mines. The last-named mine, on the southern end of the system, 
is situated just below the western slope of Bull Cliff. It has been worked to a depth 
of over 1,000 feet, has produced about $2,200,000, and has paid dividends amounting 
to $1,150,000. The Isabella has attained a depth of 1,127 feet, produced $3,200,000, 
and paid dividends of $600,000. Both mines lost their pay shoot in depth, but are 
still worked by lessees. 
The small but rich cross veins of the Empire State, Burns, Pharmacist, and 
Zenobia connect this vein system with that of the Stratton mines on Bull Hill. 
South of the Burns begins the great Vindicator vein system, traced southeastward 
for a mile through the Findley, Hull City, Vindicator, Lillie, and Golden Cycle mines. 
The Hull City and the Lillie have each produced over $1,000,000, the Vindicator 
and Golden Cycle over $2,000,000 each, all with corresponding dividend records. 
The Lillie is deepest, having attained 1,500 feet. Next in depth is the Vindicator, 
1,200 feet. All of them, except the Lillie, are still actively worked. In the whole 
system water has been and still is a source of trouble. The deepest mine evidently 
drains all the others in this vicinity. 
The Stratton properties on Bull Hill, with the Logan, Orpha May, and Pikes 
Peak veins, on which maximum depths of 1,200 and 1,500 feet have been attained, 
are now worked only to a slight extent, whereas in the early days of the camp they 
were highly productive. 
This vein system is continued southward in the Last Dollar mine, now working 
at a depth of 1,270 feet. The production exceeds $1,000,000. South of the Last 
Dollar the veins enter the Modoc ground, a mine worked for a long time with gratify¬ 
ing success. The Blue Bird, an old-time producer, is situated a short distance west 
of the Last Dollar. 
