Evolution

American Snakes

Nature Strange and Beautiful

For Red Hot Blot to Blue Singing Whale

The Modes of Origin of Lowest Organisms

Darwin and Modern Science

The Darwinian Hypothesis

The Charles Darwin Collection

Initiative in Evolution

Pragmatism's Evolution

Disentangling humans

Fires of Life

Animal of realities

Biology

On the Tendency of Species to Form Varieties

The Riddle of the Universe at the close of the nineteenth century

Darwinism stated by Darwin himself

Man's Place in the Universe A Study of the Results of Scientific Research in Relation to the Unity or Plurality of Worlds, 3rd Edition

The Coal Measures Amphibia of North America

Biology versus Theology

The Other Side of Evolution: Its Effects and Fallacy