The telephone system of the British post office. A practical handbook (1901)
Herbert, Thomas Ernest · London, New York, Whittaker and Co. · leaf 57
nature is wrapped roundthe arrangement, and the whole is then held in position by meansof two indiarubber rings. A circular zinc plate surrounding thenegative element reduces the internal resistance of the cell by dis-tributing the current through a very much larger quantity of the liquidthan is… … Figure 32. unevenly. A hole occurred about an inch and a half from the bottomand also at the point where the liquid ceases at the top. It was found byexperiment that the size of the zinc might be greatly reduced withoutproportionately increasing the resistance of the cell by using the form…
Telephone · Postal service
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