|Alternative reference number
|Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to F. H. Newman Esquire; University College, Exeter
|8 April 1921
|Informs Mr. F. H. Newman that his paper would be further improved by reference to the results of work done in 1899 and 1900 on the subject of interrupters. Notes he is returning Mr. Newman's manuscript in order that he may make this improvement.