Department in June, 1939. Secondly, since the outbreak of war the L.T.R.S. has been investigating, with Professor Hilditch's co-operation, the synthesis of fat from crotonaldehyde, which is derivable in turn from coal and lime; but the investigation has not been given high priority, and is still in the laboratory stages (Intld.) E.B. D.F.I. 10.11.1941 II CHEMICAL RESEARCH LABORATORY TEDDINGTON. Mr. Wooldridge, D.S.I.R. In response to your minute of 8/11/41, received today, I submit the following observations regarding the matters with which the enclosed letter of 7th November, 1941, from Sir William Bragg to Secretary is concerned.