Show Carbon Dioxide Filled Lamps Supply Daylight Lake Placid N. N Y Carbon Carbon dioxide filled incandescent lamps providing an artificial daylight claimed to be a wide improvement over any previous ous type of artificial daylight lamp have been commercially commercially commercially commer commer- perfected the Optical Society of America was told here The lamp is suitable for matching colors the test which has proved the undoing of most previous artificial lights Dr Thomas J. J Killian de de- de- de dared Previous attempts to use carbon dioxide in lamps a sought long-sought goal because of ot its white spectrum have havi failed because of ot the tendency of the gas gns to break down under the electric charge sent through it with consequent changes in its pressure and behavior A simple electronic control for the pressure is the new feature of ot the light |