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

The Evolution of Man — Volume 1

The Evolution of Man — Volume 2

The Evolution of Man

Monism as Connecting Religion and Science A Man of Science

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

Les énigmes de l'Univers

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

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

Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part

Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part

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 Last Link