Evolution

At the Deathbed of Darwinism: A Series of Papers

Biology

On the Tendency of Species to Form Varieties

Evolution: An Investigation and a Critique

Pleistocene Pocket Gophers From San Josecito Cave, Nuevo Leon, Mexico

The Social Direction of Evolution: An Outline of the Science of Eugenics

Essays Upon Heredity and Kindred Biological Problems

Life's Dawn on Earth

Last Words on Evolution: A Popular Retrospect and Summary

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

The Kingdom of Man

Darwinism stated by Darwin himself

Faith and Fossils

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

The Ancestry of Modern Amphibia: A Review of the Evidence

Evolution

Essays on Darwinism