Rocks & Minerals

Animals of the Past

Geological Contemporaneity and Persistent Types of Life

The Radio Boys with the Forest Rangers; Or, The great fire on Spruce Mountain

The Romance of Modern Geology

Primitive Man

The Adventures of a Grain of Dust

The Petrified Man

The Romance of Natural History, Second Series

Walks and Talks in the Geological Field

The Geology of Mt. Mansfield State Forest

The Geology of Groton State Forest

Geology and Inhabitants of the Ancient World

Thoughts on a Pebble, or, A First Lesson in Geology

The Forms of Water in Clouds and Rivers, Ice and Glaciers

Essay on the Theory of the Earth

Industrial Minerals and Metals of Illinois

Inside Illinois: Mineral Resources

A Monograph of the Trilobites of North America: with Coloured Models of the Species

Rocks and Their Origins

A Boy's-Eye View of the Arctic