Ernst Haeckel

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

The Evolution of Man — Volume 1

Freedom in Science and Teaching. from the German of Ernst Haeckel

The History of Creation

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

Monism as Connecting Religion and Science

The Evolution of Man

Last Words on Evolution: A Popular Retrospect and Summary

The Wonders of Life: A Popular Study of Biological Philosophy

Art Forms in Nature

The Riddle of the Universe at the Close of the Nineteenth Century

Monism as Connecting Religion and Science A Man of Science

Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873–1876, Plates Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873–76, Vol. XVIII

The Evolution of Man

The History of Creation, Vol. 2 (of 2) Or the Development of the Earth and its Inhabitants by the Action of Natural Causes

The History of Creation, Vol. 1 (of 2) Or the Development of the Earth and its Inhabitants by the Action of Natural Causes

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

The Wonders of Life: A Popular Study of Biological Philosophy

Monism as Connecting Religion and Science

Art Forms in Nature