Fossils

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

Glossary of Geological and Other Scientific Terms Used in the Principles of Geology

Eurypterids of the Devonian Holland Quarry Shale of Ohio

Pearls and Pebbles; or, Notes of an Old Naturalist

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

The Geology of Groton State Forest

Geology and Inhabitants of the Ancient World

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

Essay on the Theory of the Earth

North American Plesiosaurs: Elasmosaurus, Cimoliasaurus, and Polycotylus

The Common Rocks and Minerals of Missouri

Texas Rocks and Minerals: An Amateur's Guide

Fossil Forests of the Yellowstone National Park

The Geologic Setting of the John Day Country: Grant County, Oregon

The Pleistocene of North America and its vertebrated animals

The Flow of Time in the Connecticut Valley: Geological Imprints

Time Traveler