Proof, March 28, 1921

OK AND RETURN AT ONCE TO THE JOURNAL OF THE AMERICAN M E DICAL ASSOCIATION 535 N. Dearborn St. CHICAGO, ILL. RADIUM PROOF MAILED 3-28-21 FOR ISSUE OF 5-14-21 To Physicians and Hospitals we offer Important This advertise- Radium element of highest purity ment will be in- serted as it appears salts in form of Bromide or Sulphate. on this proof un- less corrections are Sales are based upon certified meas- receiyed by 5/1/=1 urement by the United States Bureau AMA of Standards, Washington, D. C. AMA WELLY American mining properties owned OUR BOSTON by this Corporation supply our BOSTON 1920 UNE = 10 1921 Radium-bearing ore and we control every mining, refining and labora- tory operation in the production of our Radium. This gives us complete knowledge of the purity which we guarantee. We manufacture Needles, Applicators, Screens and special equipment for the therapeutic use of Radium. THE RADIO CHEMICAL CORPORATION 58 Pine Street, New York Plant and Laboratories, Orange, N. J. Telephone, John 3141 Mines: Colorado, Utah ama Deston cour number