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 41
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. … with the space for the saline or acidsolution surrounding it. Next comesthe porous cell; and without this/ again the space containing the sul-f phate of copper solution. It is ne-cessary, after the porous cell hasbeen in use, to allow it to soak inseveral waters before drying it to putaway.…
