Observed Illuminates 1926 is a book written by W. Winslow Hall, which was first published in 1926. The book is a comprehensive guide to the art and science of illumination, covering topics such as the physics of light, the properties of different light sources, and the principles of lighting design. The author provides detailed explanations of the various types of lighting fixtures, including incandescent, fluorescent, and arc lamps, and discusses...