Photograph of the mobile environmental laboratory sponsored by the Marmon Group (of which Robert A. Pritzker was president). Illinois Tech faculty from the Department of Environmental Engineering used the mobile laboratory to test air and water conditions at Marmon Group plants. Photographer... Show morePhotograph of the mobile environmental laboratory sponsored by the Marmon Group (of which Robert A. Pritzker was president). Illinois Tech faculty from the Department of Environmental Engineering used the mobile laboratory to test air and water conditions at Marmon Group plants. Photographer unknown. Show less