ransome.] ROYAL TIGER MINE. 159 
The Iowa ore is carried on a Bleichert tramway, built in 1897, down 
to a mill situated in Arrastra Gulch, about a mile from its mouth. In 
1899 an additional tramway was built from the mill to the railroad, 
on the Animas River. As a whole the ore is of low grade, averaging 
from $10 to $14 a ton, and carrying a large proportion of lead. The 
mill is equipped with 1 9 by 15 Blake crusher, 2 sets 11 by 27 rolls, 7 
^-compartment jigs, 2 5-foot Huntingtons, 1 5-foot Chilian mill, and 
5 Wilfley and 8 Cammett tables. The power is steam, and the daily 
capacity of the mill is given as from 175 to 200 tons of crude ore. 
Royal Tiger mine. — This property, which is in the early stages of 
development, is on the east side of Silver Lake, and is supposed to be 
on the continuation of the Silver Lake lode. This, indeed, seems 
probable, although ii is by no means certain, as there are too many 
nearly parallel veins in this vicinity to permit offhand correlation 
across the width of the lake. The Tiger lode, moreover, presents 
several characters foreign to the Silver Lake lode as exploited on the 
west side of the lake, and may (ill an overlapping fissure nearly in line 
with the latter. The main adit is a crosscut at an elevation of 135 
feet above the lake, and the levels are numbered from this upward. 
A little stoping has been done on Level 4, but the bulk of the work 
has been on levels 2 and 3. 
The lode dips steeply northeast, the average being nearly 80°. 
Locally, however, it may sometimes have a steep southwesterly dip, 
as on level 2, about loo feet from the entrance of the tunnel. The 
width of the lode varies up to about 10 feet. It is usually fairly 
regular, but sometimes pinches for considerable distances, showing 
crushed rock accompanied by gouge, but very little ore. Near the 
entrance to level 2 the lode is divided by a horse .'50 or 40 feet in width. 
Both branches of the lode come together in the stope above this level, 
where the lode shows about 19 feet of low-grade milling ore. It here 
takes on the character of a stringer lead, consisting of a network of 
Stringers with much shattered country rock. The lode in this stope 
shows no gouge and no regular walls, the stringers running out irregu- 
lar^ into the country rock. Some of the ore-bearing stringers were 
faulted by later stringers of barren quartz. Small vugs, lined with 
quartz crystals, are frequent. The Tiger lode is frequently free from 
gouge and often without well-defined walls. In such cases the coun- 
try rock near the lode is intersected by stringers and may cany 
bunches of ore. In other places there may be clay gouge on foot or 
hanging wall, or both, and even within the lode itself. Thus, -move- 
ment subsequent to deposition of the ore has affected some portions 
of the lode, but not others. 
The mine produces essentially a lead ore carrying from 20 to 60 per 
cent lead, rarely more than 12 ounces of silver, and occasionally a 
little gold — up to half an ounce. One specimen of free gold has been 
found. The gold usually occurs associated with sphalerite and 
