I. The American Journal of Science from 1818 to 1918. Edward
Salisbury Dana 13
II. A Century of Geology: The Progress of Historical Geology in
North America. Charles Schuchert 60
III. A Century of Geology: Steps of Progress in the
Interpretation of Land Forms. Herbert E. Gregory 122
IV. A Century of Geology (continued): The Growth of Knowledge of
Earth Structure. Joseph Barrell 153
V. A Century of Government Geological Surveys. George Otis
Smith 193
VI. On the Development of Vertebrate Paleontology. Richard Swann
Lull 217