Home » categories » rare book library » Thureau. Mining in California and Nevada
This chapter is tagged (labeled) with: 

Part I Ch. 5: Treating Crushed Quartz

Part I Ch. 5: Treating Crushed Quartz Page of 67 Part I Ch. 5: Treating Crushed Quartz Text size:minus plus Restore normal size   Mail page  Print this page
36                          MINING IN CALIFORNIA AND NEVADA.
At the Idaho company's mills the process is still more elaborate, though the ore operated on does not materially differ from that obtained by the Empire Company in the same locality :—
I venture to think it would serve the purposes of this paper well, if I were to quote from a late work published by M. Walter A. Skidmore, U. S., Deputy Mineral Surveyor and Assayer, on gold mining and loss of mercury, viz.:—
" The losses of precious metals, in their treatment, may be classed as follows:—
" 1st. Fine gold passing the screens and carried by the current of water over the blankets, plates, and other appliances of amalgamation. Some coarse particles are flattened by the stamps, and expose a large surface in proportion to weight; these also float on the water current.
"2nd. Gold enfilmed with sulphurets of iron, copper, arsenic, &c,
whereby it is rendered unamalgamable.
" 3rd. Gold held by 'floured'' mercury.
" 4th. The incidental loss of mercury.
" 5th. Silver, either free or in association .with gold.
Part I Ch. 5: Treating Crushed Quartz Page of 67 Part I Ch. 5: Treating Crushed Quartz
Suggested Illustrations
Other Chapters you may find useful
Other Books on this topic
bullet Tag
This Page