Evolution

Mr. Gladstone and Genesis

The Biological Problem of To-day: Preformation Or Epigenesis

Evolution: Its nature, its evidence, and its relation to religious thought

Eurypterids of the Devonian Holland Quarry Shale of Ohio

History of biology

Darwin's On the Origin of Species

The Gospel of 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