Abney, William de Wiveleslie, Sir, 1843-1920, author · London : Piper & Carter · leaf 122
ued till a drop of silver nitrate causes no milkiness. After thoroughly draining, the gelatine is dis¬ solved by placing the vessel containing it in a jar of hot water, and the whole amount is, after adding one drachm of alcohol, made up to two ounces of solution. Captain Roger Laurent has proposed… … There are other methods of freeing the gelatine from soluble salts which have been tried, the first of which was introduced by Mr. King. He dialized his emulsion in the usual way, as practised by chemists. This method, though scientific, is tedious, and we hardly think that emulsion makers who try…
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