SOURCES

• Ads for Dr. A. Reed Shoe Company X-Ray Shoe Fitter machines. Los Angeles Times, (Los Angeles, CA) 1929.
• Ads for Radior cosmetic products. New York Times, (New York, NY) 1916-1919.
• "Blue Glass Bonanza." Denver Daily News, (Denver, CO) Jun. 11, 1876.
• "Blue Glass," sheet music, by Sam Devere, published by Louis Goullaud, Boston, 1877.
• "Drs. Owen, Cheever, Heidelberg, Horne, Edison, Copeland, Sanden, Cook, Bennett, and Chrystal electric belts," 1875-1889, newspaper ad for Health and Strength Regained, 1896.
• Gibbons, Roy. "Ban on X-Ray Shoe Fitting Devices Urged," Chicago Daily Tribune, (Chicago, IL) June 3, 1959.
• Lefebre, Thierry and Cécile Raynal. La curieuse histoire du Tho-Radia. 1 February 2005.
• Mack, E. "Blue Glass Schottische." Philadelphia: F. A North, 1877.
• Oak Ridge Associated Universities. "Shoe-Fitting Flouroscope" Health Physics Historical Instrumentation Museum Collection. 26 January 2010. http://www.orau.org/ptp/collection/shoefittingfluor/shoe.htm.
• Pancoast, Seth. Blue and Red Light; or, Light and its rays as medicine; showing that light is the original and sole source of life …. Philadelphia: J. M. Stoddart, 1877.
• Pleasanton, Augustus James. The Influence of the Blue Ray of the Sunlight. Philadelphia: Claxton, Remsen and Haffelfinger, 1876.
• "States Urged: Outlaw X-Ray in Shoe Fitting," Chicago Daily Tribune, (Chicago, IL) August 26, 1958.
• "Supernal Vision; the Culminating Scientific Discovery of the Century; Wonders of Blue Light: Females Seven Years of Age Developed into Full-Grown Women: Thought Becoming Apparent," St. Louis Globe-Democrat, (St. Louis, MO) July 16, 1876.
• Youmans, E.L. "Editor's Table: Concerning 'Blue Glass,'" Popular Science Monthly, May-Oct. 1877.