Copy letter from Frederick Alexander Towle, Assistant Secretary of the Royal Society; to the Manager of the Research Section of Messrs Nobels Explosives Company Ltd.; Ardeer Factory, Stevenston, Ayrshire Informs the Manager that the paper by H. W. Hilliar has not been published by the Society because the Admiralty considered publication undesirable from a national point of view. Notes that a small abstract of the paper was published and can be found in the issue of 'Nature' for May 6th. 11 April 1921