Mary Jeanne DeBold conducting spectrum test on metal for gyro-compass, Dodge Division

View of Mary Jeanne DeBold using a spectroscope to conduct a spectrum test on metal for a gyro-compass. Label on back: "She stands watch ashore over lives on high seas. Highlighted by the vari-colored arcs of the spectrum, Mary Jeanne DeBold's intensity of expression fully reflects her realization that lives of American sailors and fighters depend on the quality and ingredients of metals used in the gyro-compass and other vital war equipment built by Dodge Division of Chrysler Corporation. A laboratory technician at the main engineering laboratories of Chrysler Corporation, Miss DeBold is shown using a spectrum test on metal for the famous gyro, whereby Dodge assures dependable navigation on the highseas. High voltage electricity is used to create a brilliant spark-lite discharge which is photographed by the modern cameras installed in the Chrysler spectroscope. This is the most efficient and fastest way of of determining the actual content of metal bar stock. Women completely staff the Chrysler spectrographic laboratory, which is one of the few in the country. These tests are applied to most metals consumed by Chrysler Corporation and its divisions in building a wide variety of war equipment to rigid Army and Navy specifications." Handwritten on back: "Women workers."