bansome] LODES OF POUGHKEEPSIE GULCH. 193 
a strong and well-mineralized lode carrying galena, sphalerite, chal- 
copyrite, pyrite, and a little marcasite, rather equally distributed in 
a gangue of quartz with a little barite. This ore is, presumably, low 
grade. Fragments on the dump show that a part of the lode con- 
sists of brecciated and altered country rock (rhyolite flow-breccia) 
cemented by quartz. The richest ore of the Old Lout is said to have 
been bismuthiferous, in which case it is probable that an argentifer- 
ous sulphobismuthite of lead occurred in this, as in other lodes in 
Poughkeepsie Gulch. 
The Forest mine was worked through a vertical shaft only a few 
hundred feet east of the Old Lout shaft. Through this it was pos- 
sible in 1899 to gain access to an upper level 200 feet below the 
surface. The Forest lode here strikes N. 70° E. and dips south at 
about 70°. It consists of stringers of ore, without much quartz, trav- 
ersing altered country rock. These si ringers are irregular, sometimes 
expanding to 2 or 3 feet of nearly solid ore with included fragments 
of country rock, and again contracting to narrow veinlets. The ore 
is adherent to the country rock and the lode is without regular walls. 
The ore, as seen in this drift and in the ore house, consists of tetra- 
hedrite, pyrite, galena, sphalerite, and chalcopyrite, in a gangue of 
quartz and barite. The Forest mine was never a profitable producer. 
The exact course of the Old Lout lode could not be determined on 
the ground, but it is more nearly northeast and southwest than the 
Forest. The two lodes come together southwest of the shafts, and at 
this junction occurred the rich bismuthiferous ore which made the 
Old Lout profitable. The lodes are said to have dipped toward each 
other, the Forest at a lower angle than the Old Lout. If this is true, 
the dip observed at the 200-foot level of the Forest is not the general 
dip of the lode. 
The country rock of the Old Lout and Forest is a rhyolite, but so 
much altered in proximity to the ore bodies as to be scarcely recog- 
nizable. A specimen taken 7 feet from the Forest lode on the 200- 
foot level is completely recrystallized and consists of a finely crystal- 
line aggregate of quartz and sericite impregnated with minute crystals 
of pyrite and galena. As seen in thin section under the microscope, 
the sericite (and possibly some kaolin) occurs in irregular areas with- 
out definite boundaries, and also scattered through the rock amid the 
quartz grains. 
Maid of the Mist mine. — This mine, which has apparently been idle 
for many years, lies a few hundred yards northeast of the Old Lout 
and Forest shafts. The workings comprise an inclined shaft of 
unknown depth and two tunnels, one, a crosscut, cutting the lode 
about 150 feet below the surface. The strike of the vein is about N. 
25° E., and it dips southeast about 65°. It has been drifted upon and 
stoped from several levels. In the northeast portion of the workings 
it is a solid vein of quartz 18 inches to 2 feet in width, containing 
Bull. 182—01 13 
