INDEX. 
505 
Page, 
Woolsey,  L.  H.,  paper  by,  on  Lake  Fork 
extension    of    Silverton   mining 
district 26-30 
work  of 16 
Woodward,  R.  W.,  analysis  by 209 
Woodruff,  Utah,  phosphates  near 450, 455 
Wyoming,  cement  resources  of,  work  on  . . .        23 
copper  deposits  in 93-107 
geology  of  part  of 450-451 
gold  deposits  in,  work  on 71-88 
graphite  in 426-428 
analysis  of 427 
work  on 25 
iron  ores  of,  work  on 22, 190-212 
metalliferous  deposits  in,  work  on 19,22 
mica  in ■ 423-425 
work  on 24 
Page. 
Wyoming,  pegmatite  of,  mica  in 423 
phosphates   in,  character  and   geology 
of v . .  449-454 
occurrences  of 456-457 
Portland  cement  materials  in,  work  on.      232 
section  in 450-451 
structure  in 453-454 
York  Clay  Company,  Pa.,  operations  of 330 
Z. 
Zinc,  Survey  publications  on,  list  of 128 
Zinc  ore,  occurrence  of,  in  Maine 118-119 
Zollicoffer  Lake,   Iowa,   section  of   Platte- 
ville  rocks  near 228 
