 This was considered by T Division as a prospective active material.The idea was that the hydrogen's ability as a neutron moderator would compensate for the loss of efficiency, but, as Bethe later recalled, its efficiency was "negligible or less, as Feynman would say", and the idea was dropped by August 1944.Frank Spedding's Ames Project had developed the Ames process, a method of producing uranium metal on an industrial scale, but Cyril Stanley Smith, the CM Division's associate leader in charge of metallurgy, was concerned about using it with highly enriched uranium due to the danger of forming a critical mass.