A HINT.
(To the Editor of (he Evening Star.) Sm,—Will you be good enough to publish the following-, in the hope that it may be of some service to those who hare hitherto been unable to save fine gold :— First tret the copper plates with muriatic acid ; then use the amalgam in the usual way, which should be prepared as follows :—To ten pounda of quicksilver, one and a-half ounces of rodium amalgam should be used.—l am, <fee.,. Novice. Shortland, April~2nd, 1877.
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Thames Star, Volume VII, Issue 2570, 3 April 1877, Page 2
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82A HINT. Thames Star, Volume VII, Issue 2570, 3 April 1877, Page 2
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