Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 40
are produced, in the outer one of whichsulphate of copper may be used, and in the inner onea solution of Glaubers salt (sulphate of soda), or com-mon salt. These do not coat the zinc, though suf-ficient of the copper solution will eventually passthrough to make it necessary occasionally to cleanthe… … 24 DAVI S S MANUAL. crystals of sulphate of copper to the solution as itsstrength declines. 36. Fig. 14 shows the internal construction ofthis form. In the centre is seen a solid rod of zinc, Fig. 14.
