Gas and Oil Engines, Simply Explained / An Elementary Instruction Book for Amateurs and Engine Attendants

The Einstein Theory of Relativity

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

Five Stages of Greek Religion

Christianity and Greek Philosophy / or, the relation between spontaneous and reflective thought / in Greece and the positive teaching of Christ and His / Apostles

The Story of Alchemy and the Beginnings of Chemistry

Elements of Chemistry, / In a New Systematic Order, Containing all the Modern Discoveries

A History of Indian Philosophy, Volume 1

The Future of The Internet and How to Stop It