M. LUCKIESH
Reading edition
DIRECTOR OF APPLIED SCIENCE. NELA RESEARCH LABORATORY, NATIONAL LAMP WORKS OF GENERAL ELECTRIC COMPANY Author of "Color and Its Applications," "Light and Shade and Their Applications," "The Lighting Art," "The Language of Color," etc.
ILLUSTRATED WITH PHOTOGRAPHS
NEW YORK THE CENTURY CO. 1920
Copyright, 1920, by The Century Co.
DEDICATED TO THOSE WHO HAVE ENCOURAGED ORGANIZED SCIENTIFIC RESEARCH FOR THE ADVANCEMENT OF CIVILIZATION