8 =A on the first yttrium phosphate milks and the higher tabulated results on the second milks, showing incomplete solution of yttrium which suggests incomplete Solution of sample strontium as the basis of disagreement. For CL 212 and 263 the differences appear to be attributable to uncertainty in chemical yield in the final and first resolvable milk of several successive milks. Comparison of Sunshine Unit values shows satisfactory results with the two additional differences for CL 202 and 211, For these two the difference | in calcium assay is the basis of disagreement, . Numerous indirect checks are provided among the data in this bulletin, including a number of samples of each of several given types collected at the same location and time. Other check measurements are in progress. Steps have been taken to eliminate difficulties in calcium assay and The latest check samples show generally excellent agreement. Le Re sample solution, DOE ARCHIVES \32