Voltametric Law.
The law on which voltameters are based. The amount of chemical
decomposition produced by an electric current in a given electrolyte is
proportional to the quantity of electricity passed through the solution.
Fig. 344. VOLTA'S FUNDAMENTAL EXPERIMENT.
Volta's Fundamental Experiment.
The moistened finger is placed on the upper plate of a condensing or
electrophorous electroscope. The other hand holds a plate of zinc z,
soldered to a plate of copper c. The lower plate is touched with the
copper. On removing the cover the gold leaves l diverge and with
negative electricity. Hence zinc is supposed to be positively
electrified when in contact with copper. The experiment is used to
demonstrate the contact theory of electricity.