Discourses / Biological and Geological Essays

The Biology, Physiology and Sociology of Reproduction / Also Sexual Hygiene with Special Reference to the Male

Text Book of Biology, Part 1: Vertebrata

Logic / Deductive and Inductive

The Principles of Masonic Law / A Treatise on the Constitutional Laws, Usages and Landmarks of / Freemasonry

Five Stages of Greek Religion

Dialogues Concerning Natural Religion

A History of Indian Philosophy, Volume 1

The Economist

Physics and Politics, or, Thoughts on the application of the principles of "natural selection" and "inheritance" to political society

The Positive Outcome of Philosophy / The Nature of Human Brain Work. Letters on Logic