The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 145
Full Size Fig. 133a ing a current to flow in one direction only, namely—from thesolution to the plate. With two aluminium electrodes thecurrent is completely blocked. The electrolytic action causesthe deposit on the plates of a very thin (about 00005 inch)insulating film. The plates and surface of…
Telephone
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