8. Comparative Physiology of the Brain, etc. By Jacques Loeb.
9. The Stars. By Simon Newcomb.
10. The Basis of Social Relations. By Daniel G. Brinton.
11. Experiments on Animals. By Stephen Paget.
12. Infection and Immunity. By George M. Sternberg.
13. Fatigue. By A. Mosso.
14. Earthquakes. By Clarence E. Dutton.
15. The Nature of Man. By Élie Metchnikoff.
16. Nervous and Mental Hygiene in Health and Disease. By August Forel.
17. The Prolongation of Life. By Élie Metchnikoff.