Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 228
hydrogen is per-manently formed. The zinc is steadily dissolved intothe zinc solution, setting free some hydrogen. Thisforms with the copper sulphate, sulphuric acid and me- GRAVITY CELL 223 tallic copper. The sulphuric acid dissolves more zinc,while the copper plates itself on the copper element… … Fig. 112. Long Service Copper Element for Gravity Cell. The copper being taken out, bit by bit, from the coppersolution this latter gets lighter in weight and tends torise, being pushed up by the zinc solution. If the blue solution of copper sulphate ever touchesthe zinc it will copper plate it at…
Electricity
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