Leading mining historian Kerby Jackson introduces us to a classic mining publication on hard rock gold mining. Written in 1932, this hard to find publication includes valuable facts about the handling of ores from gold mines. Included in this short publication is an overview of smelting, milling, amalgamation, gravity stamp milling, the use of retorts, the refining of bullion from retorts, use of ball mills, huntington mills and arrastras, as well as details on cyanidation, gravity concentration and flotation. This publication is a must for anyone looking to develop a small gold mine. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.