Hydraulic And Placer Mining
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In our eReader you can find the full English version of the book. Read Hydraulic And Placer Mining 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 Hydraulic And Placer Mining
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117 material, otherwise the hopper and sluices must be placed upon the river-bank.
The same objections apply to the clam-shell dredge in a greater degree, for, should a stone prevent the shells from closing tight, the gold would be lost in getting the material to the hopper; besides, the agita- tion consequent upon the shutting and lowering of the dipper may be sufficient to float gold away from the material being excavated.
The Australian and New Zealand dredges are of the chain-bucket type, w...hich is an economical dredg- ing machine.
The action of the buckets being slow and uniform, no undue agitation is caused in the water and no vicious attack is made upon the bed of the river. The material is picked up slowly, hoisted at the same rate, and delivered in a continuous manner to the washer.
The buckets retain the gold from the gravel-bed to the dump, as they are water-tight and pitched to retain their entire contents.
The buckets, further, being in the centre of the boat, keep it on its centre of gravity, and as the material is brought up in smaller masses, with water in considerable quantities, it is more readily broken and washed, which is especially advantageous where clay is present.
What to read after Hydraulic And Placer Mining?
You can find similar books in the "Read Also" column, or choose other free books by E B Eugene Benjamin Wilson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
117 material, otherwise the hopper and sluices must be placed upon the river-bank.
The same objections apply to the clam-shell dredge in a greater degree, for, should a stone prevent the shells from closing tight, the gold would be lost in getting the material to the hopper; besides, the agita- tion consequent upon the shutting and lowering of the dipper may be sufficient to float gold away from the material being excavated.
The Australian and New Zealand dredges are of the chain-bucket type, w...hich is an economical dredg- ing machine.
The action of the buckets being slow and uniform, no undue agitation is caused in the water and no vicious attack is made upon the bed of the river. The material is picked up slowly, hoisted at the same rate, and delivered in a continuous manner to the washer.
The buckets retain the gold from the gravel-bed to the dump, as they are water-tight and pitched to retain their entire contents.
The buckets, further, being in the centre of the boat, keep it on its centre of gravity, and as the material is brought up in smaller masses, with water in considerable quantities, it is more readily broken and washed, which is especially advantageous where clay is present.
What to read after Hydraulic And Placer Mining?
You can find similar books in the "Read Also" column, or choose other free books by E B Eugene Benjamin Wilson to read onlineMoreLess
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