Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 439
Refining Your Wastes You have several kinds of wastes containing Gold,Silver and Platinum, such as Sweeps, Sinks, Polishings,Filings, Scraps, etc., and you probably realize that eachkind of waste requires a different treatment. For instance,your sweeps cannot be handled the same as your filings,nor…
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
