INDEX. 
31 
Page. 
Veins, "linked type" of, characteristics 
of 18 
means of formation of 16 
most important, in Tonopah district, 
kind of rock occurring in 15 
of early andesitic period, range of dis- 
coveries of 19 
physical character of 21 
subsequent to early rhyolite intrusion, 
character and metallic content of. . 16 
subsequent to early rhyolite intrusion, 
difficulty of distinguishing from 
andesitic veins 16 
subsequent to later rhyolite intrusion, 
character and metallic content of.. 17 
Page. 
Veins, productive, age of 18 
Veins, rhyolite, rocks in which they may 
occur 17 
Volcanic necks 11, 16 
Volcanics and tuffs of the district 9 
Wandering Boy mine, early andesite rock in 13, 15 
Wandering Boy shaft, rock in which lo- 
cated 15 
Waters, hot, ascending, concerned in pro- 
duction of veins subsequent to early 
andesite and early rhyolite intru- 
sions 16 
We.st End mine, reference to 8 
West End shaft, rock in which located 15 
Zinc, possibility of finding, in depth 28 
o 
