Very interesting pamphlet originally published in 1917 by the Radium Appliance Company. The first section gives a glimpse of the atomic theory as understood in 1917. The second section is composed of dozens of testimonials as to the device's efficiency. The third section is another pamphlet titled: RADIUM - Its Diffused Energy; A New Physiological anbd Curative Force in Medicine. by J.W. Coolidge, MD. In his own words: "..the latest and greatest of all known curative forces employed in the care of the body." Reprint of the original. For information and historical purposes only.