Circular letter from [James C] Philip, Assistant Secretary of the Chemistry Sub-Committee, to chemists involved in paraldehyde preparation Encloses some notes on the aldehyde production process developed by Mr King and Dr Mason of Imperial College -- points out that new information shows paraldehyde might be replaced by acetal in the production of beta-eucaine, and requests that laboratories began producing this instead. Notes that the process is confidential. 5 January 1915