Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 615
old to render it a con-ductor. The case is then suspended in a bath of copper 594 ETHER DYKA3HCS. sulphate dissolved in dilute sulphuric acid. The — pole ofa galvanic battery or dynamo machine is applied to it; andfrom the + pole is suspended in the bath a copper plateopposite and near to the wax… … Fig. 482 forms new molecules of copper sulphate. When the copperfilm has acquired about the thickness of an ordinary visitingcard, it is removed from the mold. This shell shows dis-tinctly every line of the types or engraving. It is thenbacked^ or iilled in, with melted type-metal, to give…
Physics
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