Experiments with Alternate Currents of High Potential and High Frequency

Voltaire's Philosophical Dictionary

A Discourse of a Method for the Well Guiding of Reason / and the Discovery of Truth in the Sciences

Symbolic Logic

Mysticism and Logic and Other Essays

Advanced Chemistry

Introduction to the Philosophy and Writings of Plato

The World's Greatest Books — Volume 14 — Philosophy and Economics

On the Origin of Species By Means of Natural Selection, or, the Preservation of Favoured Races in the Struggle for Life

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

An Elementary Study of Chemistry