Underground Treasures: How and Where to Find Them A Key for the Ready Determination of All the Useful Minerals Within the United States

CHAPTER V.

Chapter 549 wordsPublic domain

ASSAY OF ORES.--When an Ore will Pay--Washing for Gold and Platinum--How to Assay Gold in the Simplest Way--To Test any Rock for Gold and Silver--To Find the Purity of Gold--To Detect and Assay Silver Ores--Assay of Copper, Iron, Zinc, Tin and Lead Ores-Ready Method of Testing Graphite.....92