On Light and Other High Frequency Phenomena

The Problem of Increasing Human Energy, with Special References to the Harnessing of the Sun’s Energy

Inventions, Researches And Writings Of Nikola Tesla

Philosophiae Naturalis Principia Mathematica (Latin Version)

A Spy's Guide To Strategy

Electrical Oscillators

The Mathematical Works of Lewis Carroll

Concise Dictionary of Mathematics

The Theory and Practice of Gamesmanship

High Frequency Oscillators for Electro-Therapeutic and Other Purposes

Concise Dictionary Of Chemistry