2 19 and 19 pCi in the adult whole body. Other measurements ulso seem to in- dicate that the range of body burden in the United States is only a factor of about 2. It should be noted that the concentration of radium in the body is independent of age, although the absolute body burden will increase with the growth of the skeleton. More extensive measurements are avuiilable on the dietary intake of radium-226, These include data from the Health and Safety Laboratory for the three cities mentioned above and the Public Health Service for eleven other cities. These data are given as an illustration in the table below. Radium-226 in Total Diet from 1964 to the Middle of 1967 (from December 1969, Radiological Health Data and Reports ) a Sampling Location - Boston Palmer, Alaska Chicago Idaho Falls Seattle Denver Cleveland Burlington, Vt. Honolulu Wilmington Pittsburgh Mean pCi/kg 0.52 254 58 58 61 -61 -62 .62 4 «70 -73 Radium-226 in Total Diet in 1966 (Health and Safety Laboratory, AEC) New York 0.91 San Juan 1.0 San Francisco -63 The range of dietary intakes is also less than a factor of 2. Measure- ments from year to year are not necessary since the concentration of this