30 Sample be lima, Peru: Sunshine Units Furnished by Dr. Alberto Hurtado, Maternity Hospital of Lima. Collection arrange- ments made by Dr. R, B, Watson, Rockefeller Foundation, Rio de Janeiro, Brazil. (1) CL 812-P: Age few hours, July h, 1955, ribs and femr, 0,903 g ash, 0.33h g Cas (2) | (3) CL 809-P: Age few hours, July 6, 1955, ribs and femur, 1.26 g ash, 0.l)6 g Ca, CL 80h: Age few hours, August 3, 1955, ribs and femr, 5.1 g ash, 1.96 g Ca. (4) CL 807: Age 6 days, A #55-2h7, August h, 1955, (5) ribs and femr, 2. g ash, 1,11 g Ca. CL 806: Age few hours, A #55~251, August 8, 1955, ribs and femur, 1.26 g ash, £0.7 0.49 g Ca, (6) CL 810-P: Age 8 days, A #55-2l6, August 0.36 + 0.12 . (7) 0.7 + Oo 5, 1955, 1.83 g ash, 0,68 g Ca, CL 811: Age few hours, A #55~2h5, August 5, 1955, ribs and femur, 2.4 g ash, 0.99 g Cae (8) CL 808-P: Age 10 days, A #55~365, September 9, 1955, ribs and femur, 1.08 g ash, 0.4 g Ca. (9) CL 805-P: Age ly days, A #55-367, Sep~ tember 10, 1955, ribs and femur, 1.2 g ash, By 0.52 g O-6h + 0.28 2.16 + 0.)0 Cae Children (30 days to 15 years) le United States ae Furnished by Dr, Shields Warren, Cancer Research Institute, New England Deaconess Hospital, Bosten, Massachusetts. (1) CL 850-P: Age 84 years, Massachusetts, 435102, April 15, 1955, vertebrae, 5eh7 g ash, 2.26 g Ca, (2) CL 851: Age 2 10/12 years, Massachusetts, A55~103, April 16, 1955, vertebras, 5.1 g ash, 1,8) g Ca, 0.13 + 0.04 £0.21