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Assayer's Guide; Or, Practical Directions To Assayers, Miners, And Smelters
For The Tests And Assays, By Heat And Wet Processes, Of The Ores Of All The Principal Metals, Of Gold And Silver Coins And Alloys, And Of Coal, &C »
For The Tests And Assays, By Heat And Wet Processes, Of The Ores Of All The Principal Metals, Of Gold And Silver Coins And Alloys, And Of Coal, &C »
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, O... »
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, O... »
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