Spectroscopy & Spectrum Analysis

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

Visual Illusions: Their Causes, Characteristics and Applications

A Color Notation

Six Lectures on Light

The Telephone

The Wonders of Optics

A Preliminary Dissertation on the Mechanisms of the Heavens

Hormones and Heredity

The natural and artificial disintegration of the elements

Animal intelligence: Experimental studies

Little Masterpieces of Science: Invention and Discovery

The Practical Astronomer