Letter from [James C Philip], Assistant Secretary of the Chemistry Sub-Committee, to K J P Orton, University College of North Wales Understands from Mr King that the presence of water is not likely to make a difference in the preparation of acetal. Informs Orton that the use of acetal in place of paraldehyde has great advantages in yield and production time, so that 'it seems quite clear we should push on with the preparation of acetal'. Asks Orton for estimates of the cost of paraldehyde and acetal. 8 January 1916