Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 103
s described in Chap-ter IV., does not acquirethe photogenic property,until it has been submittedto the aceto-nitrate of silver, whenthe iodide of potassium passes tothe state of iodide of silver. Albu-men does not perform any chemicalpart in the reactions ; it is nothingmore than a medium in which… … Papers entirely different, which are com-posed of vegetable matters, of glue, andsometimes of certain salts, become suscep-tible of alteration under the action ofchemical combinations, and the albumenremains inert in the whole course of thereactions; it is its physical state alonewhich should…
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