a a —— ‘stainless steel, The contaminated nickel was again of the same amount used in the - previous study and that contained the bulk of the uranium contamination. In the remelt we found readings that were negligible in the nickel stain- less steel and the residual radium contanAnetion was the same as that found for the pre-Atomic Energy produced N.B.&. standard as was expected. Fost of the contamin~ ation came off with the slag. Next slide, please, The stainless steel remelt, in that we found a similar situation, In remelting the ateinless we found thot our sub-surface sample was comparable to the sample produced that we obtained from the National Bureau of &t andard 8. The major bulk of the contamination came off in the slag, We found in the top half surface some slag of contamination of 50.5 milligrams of uranium per gram. Copper semples were obtained from Oak Ridge and put in three batches; those that showed alpha contamination of 800, 4,000 and 62