An Elementary Study of Chemistry

Advanced Chemistry

Taboo and Genetics / A Study of the Biological, Sociological and Psychological Foundation of the Family

A Text-Book of Astronomy

The Symbolism of Freemasonry / Illustrating and Explaining Its Science and Philosophy, Its Legends, Myths and Symbols

The Philosophy of the Moral Feelings

Criminal Sociology

The Einstein Theory of Relativity

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

The Mystic Will. A Method of Developing and Strengthening the Faculties of the Mind, through the Awakened Will, by a Simple, Scientific Process Possible to Any Person of Ordinary Intelligence

Astronomy for Amateurs