Two Band Systems of Tungsten Oxide

Abstract

THE spectrum of a high-tension D.C. arc between spectrographically pure tungsten electrodes was photographed in the near infra-red, the visible and the ultra-violet regions using the Steinheil 3-prism-spectrograph with a camera focus of 1,600 mm. Though the spectrograms were largely covered with continuous background, a number of red degraded bands could be recognized and were measured on the Abbe comparator.