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The Photographic art-journal (1851)

Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 388

An illustration from The Photographic art-journal, 1851, leaf 388
receive the deposit. Tocharge this, pour in the several solutions :hang a piece of copper on the brass rod c ;connect this rod with the copper of thegenerating cell by the wire z; and theother rod m, with the zinc, by the wire x;then, and not till then, (§60) hang themoulds on the rod m. 49. By an… … (§ 13.) the copper from the solutionistransferred to the mould; and the coppersheet is dissolved, being converted with thesulphuric acid into sulphate of copper ;thus keeping up the strength of the solu-tion. The time is somewhat loDger by thismethod : two days will produce a medal ofvery good…

Photography · Art and photography

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