The Transactions of the Canadian Mining Institute, Volume 17

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Canadian Mining Institute., 1914 - Mineral industries
 

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Page 151 - the unreliability of estimated quantities which included ground that had not been adequately explored. The paper was discussed at great length and the Council afterwards issued to members of the Institute, inter alia, the following recommendation: "In making use of the term 'ore in sight' an engineer should demonstrate that the ore so
Page 366 - Technical Paper 30. Mine-accident prevention at Lake Superior iron mines, by DE Woodbridge. 1913. 38 pp. 8 figs. Technical Paper 40. Metal-mine accidents in the United States during the calendar year 1911, compiled by AH Fay. 1913. 54 pp. Technical Paper 46. Quarry accidents in the United States during the calendar year 1911, compiled by AH Fay. 1913. 32 pp. Technical Paper
Page 83 - Briefly explained, the preliminary desulphurizing treatment breaks up the refractory silver minerals when the slime pulp is brought into contact with aluminum in a caustic soda solution, the silver being left in a spongy, metallic state readily amenable to cyanide treatment. The desulphurizing is accomplished by passing the slime pulp through a revolving tube mill, in which there
Page 246 - If there is any coating on the sides and bottoms of the beakers which cannot be readily detached with a piece of filter paper, it is treated in the beaker with a hot solution of caustic soda which quickly disintegrates it. The caustic soda solution is acidulated with a little nitric acid and washed into the filter with the insoluble residue. Most of the silver
Page 78 - The mills are arranged parallel to each other and at right angles to the battery, the driving, shafting and gears being arranged at the feed end of the mill. Each mill is driven by a
Page 151 - that the ore so determined is capable of being profitably extracted under the working conditions obtaining in the district.
Page 28 - of the old channels are in places above and in places below those of the streams of the present creeks which they cross, these older gravels now occur both as bench deposits above those of the present stream gravels and as buried gravels below the level of the present stream bottoms. These old channel
Page 366 - 46. Quarry accidents in the United States during the calendar year 1911, compiled by AH Fay. 1913. 32 pp. Technical
Page 247 - This method of burning the filter papers is an essential step, since it avoids losses of silver chloride which are apt to occur if the burning is done rapidly in a muffle. Fine test lead is sprinkled over the burned silver , chloride residues and the lead buttons resulting from the crucible fusions or scorifications of the corresponding
Page 287 - From what has been said above, it will be seen that the

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