Rivers and valleys of Pennsylvania, I 183, 271

Rivers of northern New Jersey with notes on the general classification of rivers, II 68, 81

Topographic models, I 271

Drainage of Pennsylvania (

Davis

), I 183

of northern New Jersey, II 81

systems classified, I 35

Depths of oceans, I 149

DuHalde's references to Bering's voyage of 1725–30, II 118