Letter from W H [William Henry] Bragg, A.S.D., Admiralty, to Sir J [Joseph] Larmor, St. John's College, Cambridge He has never written to thank Larmor for replies to his enquiries. The question is difficult to answer, but he feels sure that Larmor is right. Larmor mentioned the absorption of alternating current energy in water. They have spent a good deal of time on this, making measurements of the resistance of sea water at all frequencies. Disturbances of a few hundreds per second are propagated better than expected and he gives his own tentative explanation for this. The dimensions and range of their apparatus are small compared to wavelength. They have a mass of material not analysed or published. 13 August 1918