The book The Metallurgy of Gold was written by author Thomas Kirke Rose Here you can read free online of The Metallurgy of Gold book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Metallurgy of Gold a good or bad book?
Where can I read The Metallurgy of Gold for free?
In our eReader you can find the full English version of the book. Read The Metallurgy of Gold Online - link to read the book on full screen.
Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book -
Read Book The Metallurgy of Gold
What reading level is The Metallurgy of Gold book?
To quickly assess the difficulty of the text, read a short excerpt:
Z. * The ore in this district may be regarded as on the border line between "refractory" and "free-milling" ores. It varies greatly in hardness and composition, and consists of "stringers" of quartz running through a more or less decomposed and brecci- ated hornblende-andesite. The gold is often in visible specks and threads in the quartz, but is also largely associated with copper and iron pyrites, blende, galena, stibnite, &c. , the quan- tity of sulphides varying from j to 10 per cent, of th...e ore, and averaging from 2 to 3 per cent. Silver occurs as argentite, fcc. , while tellurides of both gold and silver are sometimes found. The average amounts extracted from the ordinary ore are gold, 5 to 10 dwts. Per ton, silver, 2 to 5 dwts. ; but a considerable percentage of the gold recovered comes from "specimen" ore, which is often worth some thousands of pounds per ton. No rock-breakers are used, grizzlies or sizing screens being also unknown, and the feeding is done by hand. The small stuff is shovelled into the mortar, and big pieces of rocks are rolled into the feed opening, and rammed in by a few blows of the sledge hammer, if they stick there.
User Reviews: