Table l. 2262, in human bone NUMBER OF LOCALITY SAMPLE U.S.A. (mostly Illinois) ci/g pCi/e (1073) (1¢ fresh weight 128 U.S.A. ' (Chicago residents ci/g pci/eg ash (107°) ci/g pCi/g Ca 3.7 (0.5 - 28.6) 14 | last 15 yrs. or (107° (10 ~) Sample type rib, skull, tibia, (3) rib (3) vertebrae femur, etc. 1.5 (0.5 - 2.8) more ) U.S.Ae Reference __ New York San Francisco U.S.A. (Rochester ) 64 3.2 71 9 2.6 364 + 0.4 (1.8 - clavicle vertebrae (0.36 - 2.9) foot note: 42 " (1) 4.8) 1.1 + 0.3 U.S.A. vertebrae 1.2 (0.5 = 2.7) (1) + SE. (2) figures in brackots indioate the range (Min. - Max. ) rib (5) (22)