VOL. IV 
PL. X 
£fi^jUiii : u jvj -GAIL s-mxrnx m 
<d AIR is © n ip 1 H3 ir ©us 
Coal Measures. 
IFODSSinn UTIL* ODIffiA 
l 
L.eo Lesquereux del. 
A.H.Wbrthen - direxi. 
Western Engraving Co Chicago 
- 
