John Tyndall

Faraday as a Discoverer

Six Lectures on Light

Fragments of science, V. 1-2

Goethe's Farbenlehre : Theory of Colors

Works of John Tyndall

Sound

How to Grow Marijuana Outdoors: A Step-by-Step Beginner's Guide to Growing Top-Quality Weed Outdoors (Unabridged)

How to Grow Marijuana Indoors: A Step-by-Step Beginner's Guide to Growing Top-Quality Weed Indoors (Unabridged)