eeks.] CLASSIFIED KEY TO THE INDEX. 139 
Page. 
ydrology — Continued. 
Mexico 176 
Mississippi Valley region 176 
New England and New York 176 
Ohio Valley region 176 
General 176 
laho ' 176 
inois 176 
idiana 1 76 
ldian Territory 1 76 
>wa 176 
jra 177 
Alaska 177 
Atlantic coast region 177 
Great Basin region 177 
( J reat Plains region 177 
Greenland 177 
Pacific coast region 177 
Kocky Mountain region 177 
Southwestern region 177 
ansas 177 
entucky 177 
ouisiana 177 
aine 177 
[arcus Island 177 
[aryland 177 
Massachusetts 1 78 
Mexico 1 78 
ichigan 1 78 
ineralogy 1 78 
inerals described 179 
[innesota 1 82 
Lississippi 183 
fissouri 183 
[ontana 183 
ebraska ■ 183 
evada 183 
iew Hampshire 183 
ew Jersey 183 
ew Mexico 184 
ew York 184 
icaragua 184 
omenclature 184 
orth Carolina 184 
ortli Dakota L85 
bio 185 
klahoma 185 
rdovician 1 85 
Appalachian region 185 
Canada 185 
Great Lakes region - 185 
Great Plains region 1 85 
Mississippi Valley region 185 
