Evolution

The Last Link: Our Present Knowledge of the Descent of Man

The Evolutionist at Large

Degeneration: A Chapter in Darwinism

Degeneration: A Chapter in Darwinism

The Temple of Nature; or, the Origin of Society

Are the Effects of Use and Disuse Inherited

The Biological Problem of To-day: Preformation Or Epigenesis

Essays on Darwinism

Evolution and Adaptation

Darwinism stated by Darwin himself

Faith and Fossils

The Kingdom of Man

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

The Coal Measures Amphibia of North America

Biology versus Theology

The Ancestry of Modern Amphibia: A Review of the Evidence

Essays Upon Heredity and Kindred Biological Problems

Last Words on Evolution: A Popular Retrospect and Summary

Evolution

Life's Dawn on Earth