Dated 1871-1875. From Material relating to experiments designed to measure electromotile forces and electric potential, [1834-1875].

Working notes compiled by Charles Wheatstone comprising measurement of the electro-motive force between electrodes coated with films of sulphides, bromides and iodides, elements including zinc, mercury, cobalt and rubidium, and between electrodes of various alloys; measurement of electric potential of compound circuits; observations on the manufacture of amalgams; calculation of the weights of products of electrophoresis; the phenomenon of 'passivity'; employment in electric cells of peroxides and teroxides.