Geology

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

Industrial Minerals and Metals of Illinois

Geology and Inhabitants of the Ancient World

Earths Magnetic Shifts

Deep Cave Networks

The Principles of Stratigraphical Geology

Giant's Causeway

Natural Resources

Meteorological Mysteries

Mountain Lake Chains

Catatumbo Lightning

GPS Revolution

Dry Cave Systems

Plasma Clouds

Earthquake Lights

Riverside Views

Mountain Weather Effects

Planetary Boundaries

North or South

Aurora Phenomena