Optics & Light

Light and Colour Theories, and their relation to light and colour standardization

On an Inversion of Ideas as to the Structure of the Universe

Spectropia

Five of Maxwell's Papers

Experimental Determination of the Velocity of Light

Visual Illusions: Their Causes, Characteristics and Applications

A Color Notation

Six Lectures on Light

On Light and Other High Frequency Phenomena

Tesla’s Oscillator and Other Inventions

Final Theory of Light

Seeing the Light

Curiosities of Science, Past and Present

How it Works

The Le Sage Theory of Gravitation

The Colour-Sense: Its Origin and Development

The Wonders of Optics

Popular scientific lectures