 The committee also suggested suitable industrial organisations and ... "furnished us with a blueprint for the complete industrial organization of the project which Groves mostly followed ... and gave us more confidence concerning the feasibility of producing sufficient quantities of fissionable material".In April–May 1944 another committee under Lewis recommended construction of the S-50 thermal diffusion plant developed by Philip Abelson of the US Navy.He was made professor emeritus in 1948 and continued to work within the department until his death on 9 March 1975.