Methods for Determining Radon‐222 and Radium‐226

A contribution to the Journal by Frederick B. Higgins Jr., Graduate Research Asst.; Werner N. Grune, Prof, of Civ. Eng.; and Benjamin M. Smith, Graduate Research Asst., all of San. Eng. Research Laboratories, Georgia Institute of Technology, Atlanta, Ga., and James G. Terrill Jr., Asst. Chief, Div. of Radiological Health, USPHS, Washington, D.C. The article is based on a thesis by the senior author approved in partial fulfillment of the requirements for the degree of Master of Science in Sanitary Engineering in the School of Civil Engineering, Georgia Institute of Technology, May 13, I960.