The Assayer's Guide: Or, Practical Directions to Assayers, Miners, and Smelters, for the Tests and Assays, by Heat and by Wet Processes, of the Ores of All the Principal Metals, and of Gold and Silver Coins and Alloys |
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according accurate acid added alloy already American amount amount of silver applied ascertain assay assayer Author Bismuth borax Bound brick button calculated charcoal chemical Chemistry clay cloth cloth extra coin common COMPANION Complete consists contains contents copper course covers crucible cupels Designs Directions drawing Edition employed Engineer Engravings flux former furnace gilt edges give given gold grains half hand heat Hessian hundred Illustrated immediately inch introduced iron kind latter lead loss MANUFACTURE measure melting metal method mixed morocco muffle nature necessary never nitric acid occurs once operation oxide piece placed Plate platinum Pound powdered practical prepared present procured produced pure quantity regulate remarked remove result round royal 8vo seen shape shows silver Sketches slag solution sufficiently taken term THOMAS tion United various vary Volume washing weight whole
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