LC copy incomplete: v. 12 only. Vols. 1-4. Outlines of cosmic philosophy -- v. 5 Myths and myth-makers -- v. 6. The unseen world and other essays -- v. 7. Excursions of an evolutionist -- v. 8. Darwinism and other essays -- v. 9. Studies in religion -- v. 10. A century of science -- v. 11. The Mississippi Valley in the Civil War -- v. 12. Civil government in the United States.