TO W. GARNETT, Esq.

                                                                        Glenlair, 8th July 1874.

     . . . In the MS. he [Cavendish] appears to be familiar with the theory of divided currents, and also of conductors    in series, but some reference to his printed paper [on the Torpedo] is required to throw light on what he says. He    made a most extensive series of experiments on the conductivity of saline solutions in tubes compared with wires    of different metals, and it seems as if more marks were wanted for him if he cut out G. S. Ohm long before   constant currents were invented. His measurements of capacity will give us some work at the Cavendish Lab.,
     before we work up to the point where he left it. His only defect is not having Thomson's electrometer. He found    out inductive capacity of glass, resin, wax, etc.