Rocks & Minerals

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

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

Researches on the Visual Organs of the Trilobites

Relics of Primeval Life: Beginning of Life in the Dawn of Geological Time

Water Reptiles of the Past and Present

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

Deserts: Geology and Resources

Cave Hunting

The Geologic Story of Glacier National Park

The Lost Lemuria

Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico

The zoology of the voyage of H.M.S. Beagle: Fossil mammalia

Voyager 1 Encounters Saturn

The Survival Handbook

The Rise and Progress of Palaeontology