Copy letter from [George Gabriel] Stokes, Secretary of the Royal Society; to Major [John] Herschel, FRS Informs Major [John] Herschel's paper on Gavimeters will be published on condition of a modification and reduction of the Introduction, which is not suitable to be published in the Proceedings. Also states the description of the Gavimeter could be made clearer, considering the model constructed did not fulfil the result it was designed for. [John Herschel published 3 papers on the gavimeter in the same year, which one is referred to, if any is not identified]. 24 March 1881