Science

The Coal Measures Amphibia of North America

Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: Eurypterida

The Le Sage Theory of Gravitation

The dawn of astronomy

Modern cosmogonies

Illogical Geology, the Weakest Point in the Evolution Theory

The Flying Saucers are Real

Biology versus Theology

The Other Side of Evolution: Its Effects and Fallacy

The Preparation of Illustrations for Reports of the United States Geological Survey

Letters on Astronomy in which the Elements of the Science are Familiarly Explained in Connection with Biographical Sketches of the Most Eminent Astronomers

On the Continuity of Effect of Light and Electric Radiation on Matter

Selenium cells

The Wonders of Optics

Treatise on Light

The peaceful atom

Experimental Mechanics

The Roswell Report: Case Closed

The Earliest Electromagnetic Instruments

The Evolution of Worlds