Synopsis of a Report On Mining in California And Nevada Usa
Synopsis of a Report On Mining in California And Nevada Usa
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Is deducted for the distance between the engine, sheaves, and mouth of shaft, leaves 43 cwt. In the shaft ; this weight changes continually, so that when the bottom cage reaches the surface the weight of rope will be reversed. During the first part of the winding the power much exceeds that required half-way up, and at the latter end the engines have actually to be "braked" in order to meet the increasing and more than counterbalancing weight of the descending- cage and longer rope together. Wh...at strikes one as most unusual, was the extreme care which the mine superintendents generally bestowed on these wire ropes, and the observation of these officials, that " they (the ropes) formed the only link by means of which many valuable lives could hope to see daylight ^again" appears very appropriate under the circumstances. All these ropes are stored in a drying shed, after each rope had run "four months" over the sheaves ; they are then taken off, cleaned, and carefully repaired wherever necessary, and finally they are given a good coat of coal tar mixed with asphaltum warmed to liquidity.
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You can find similar books in the "Read Also" column, or choose other free books by G Thureau to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Is deducted for the distance between the engine, sheaves, and mouth of shaft, leaves 43 cwt. In the shaft ; this weight changes continually, so that when the bottom cage reaches the surface the weight of rope will be reversed. During the first part of the winding the power much exceeds that required half-way up, and at the latter end the engines have actually to be "braked" in order to meet the increasing and more than counterbalancing weight of the descending- cage and longer rope together. Wh...at strikes one as most unusual, was the extreme care which the mine superintendents generally bestowed on these wire ropes, and the observation of these officials, that " they (the ropes) formed the only link by means of which many valuable lives could hope to see daylight ^again" appears very appropriate under the circumstances. All these ropes are stored in a drying shed, after each rope had run "four months" over the sheaves ; they are then taken off, cleaned, and carefully repaired wherever necessary, and finally they are given a good coat of coal tar mixed with asphaltum warmed to liquidity.
What to read after Synopsis of a Report On Mining in California And Nevada Usa?
You can find similar books in the "Read Also" column, or choose other free books by G Thureau to read onlineMoreLess
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