From the beginning of the industry, all branches of science have contributed to the continuous improvement of the automobile, making it more dependable, more economical, safer. The science of optics, dealing with the nature and properties of light, is no exception. Our knowledge of science is valuable only when it is usefully applied. This book shows how the scientific facts of optics and light have been applied to solve the problem of safer night driving through the development of the "Sealed Beam" headlamp a co-operative project undertaken jointly by the automobile industry, lamp manufacturers and highway safety groups. (1940 - Public Relations Staff GENERAL MOTORS)