 Highly enriched uranium was also far more valuable than natural uranium, and he wanted to avoid the loss of even a milligram.He recruited Richard D. Baker, a chemist who had worked with Spedding, and together they adapted the Ames Process for use at the Los Alamos laboratory.In February Baker and his group made twenty 360 gram reductions and twenty-seven 500 gram reductions with highly enriched uranium tetrafluoride.