This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...show whether free chlorine exists in any surface water--it certainly could not exist at any depth. Some years ago I was informed by Mr. A. W. Howitt that he knocked off the points of many stalactites of limonite which had formed in an old auriferous mine. These secondary products were assayed by the ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...show whether free chlorine exists in any surface water--it certainly could not exist at any depth. Some years ago I was informed by Mr. A. W. Howitt that he knocked off the points of many stalactites of limonite which had formed in an old auriferous mine. These secondary products were assayed by the late Cosmo Newbery, and gave a return--so far as I remember--of about lodwt. per ton. It is therefore certain that. if this gold were not previously in n. finely divided state, so fine as to be carried along with the trickling water charged with iron salts, there must have been a re-solution and a re-deposition. I cannot see that such surface solution would tend to form nuggets or masses of gold, but it would tend to enrich masses of limonite which it would accompany in this action, being different from a mere oxidisation and solution of pyrites, the gold contained being unacted on, and consequently left behind. Everybody knows, or should know, the difficulty of amalgamating and saving by ordinary processes such fine gold. The Mount Morgan metallurgist learnt their lesson, and in return have given the world an object lesson on the economical and effective treatment of low-grade ore. It would fill 3 volume to describe in detail the plant in connection with Mount Morgan. There are numerous departments, each with its own skilled officer in charge, while the whole of these are under the general metallurgical engineer, Captain G. A. Richard. Looking over the side of the mount, a bird's-eye view is obtained of buildings and sheds, scattered round the slope, covering many acres in the aggregate. The foundry and engineering shops at the base of the hill; the electrical plant works; the sulphuric acid works; the metallurgical furnaces and sheds, all...
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