The SciencesOn a Modified Form of Wheatstone's RheostatBy Shelford Bidwell on June 12, 1886AdvertisementABOUT THE AUTHOR(S)Recent Articles by Shelford BidwellVoltaic Cell with a Solid ElectrolyteOn the Generation of a Voltaic Current by a Sulphur Cell with a Solid ElectrolyteOn the Changes Produced by Magnetization in the Length of Rods of Iron, Steel, and Nickel