National Telegraphic Union · New York : N.T.U. · leaf 144
ezinc plate, interfering with the action of the battery. Asthe conducting power of a solution of sulphate of zinc isfound to be greatest when diluted with an equal quantityof water, part of the solution in the zinc cell should beoccasionally removed and replaced with water. It is much better for… … with a closed circuit, when it will be found in workingorder. The addition of a little sulphate of zinc willgreatly hasten its action. In this case the zinc shouldnot be amalgamated, as the metallic copper depositedupon the zinc plate combines with the mercury, andforms an amalgam which greatly…
Telegraph
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![An illustration from The Telegrapher [microform], 1864, leaf 144](https://img.insideoutlibrary.com/img/1024/ia-telegrapher05nati-144-90.webp)
