Show carbon dioxide filled lamps su supply aply daylight lake placid N Y carbon dioxide filled incandescent lamps providing an artificial daylight claimed to be a wide improvement over any previous type of artificial daylight lamp have been commercially perfected the optical society of america was told here the lamp is suitable tor for matching colors the test which has proved the undoing of most previous artificial lights dr thomas J killian declared previous attempts to use carbor dioxide in lamps a long sought goal because ot of its white spectrum hav failed because of the tendency of the gas to break down under thi electric charge sent through it with consequent changes in its pressure and behavior A simple elect electronic ronia control for the pressure Is the new IV feature of 0 the light |