A text-book on chemistry. For the use of schools and colleges (1866)
Draper, Henry, 1837-1882 · New York, Harper & brothers · leaf 175
drawn from the sulphate in the so-lution, but, while this is going on, sulphuric acid andoxygen are being evolved on the mass of copper, C.They therefore unite with it; and thus, as fast as cop-per is precipitated on 2sT, by oxidation new quantitiesare obtained from C, and the liquid keeps up its… … ELECTROTYPING. 163 coat of copper, which may be readily split off from it.It is a perfect copy of the surface on which the depositiontook place, and in turn it may be* used as a mould forobtaining a great number of casts. Often it is undesira-ble to use the original coin or medal, and in such…
Chemistry · Physics
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