INTIRNATICNAL DISTRIBUTION OF RADIOISOTOPES (First 20 Months, Septomber 3, 1947 to April 30, 1949) Isotopes Available and Shipments Made Tsotone No, of Shipments Antinony-122 —~124 —125 Argon-37 Arsenic-76 ~7? Bromince—-82 Calcium-45 112 Garbon-14 AO Chlorinc—-36 Cobalt~60 16 Copper-64 Gold-198 ~199 Iodince-131 Tron-55 il? ( 2? -59 ( Kerecury-197 ~—2038 , 205 Phosphorus-32 Potassium-42 Silver-1310 = 0 mw Sodium—24 aot