Mines And Minerals of the British Empire Being a Description of the Historical
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Through the skill of constructing engineers and operating employees the sphere of application has been extended to flats and banks beyond the possibilities of successful treatment in the ' boom ' days.
A most important event in the history of the industry was the installation of a dredge in 1894 with a tailings-elevator for the disposal of the waste gravel after treatment. This enabled the dredges to exploit much deeper ground and banks high above the water-level.
CHIEF MINERAL LOCALITIES 187 8.... The magnitude of operations at the present day may be shown by figures for 1906 extracted from a Report by the Inspecting Engineer of Mines for New Zealand : District.
No. Of Dredges.
Yield.
Dividends.
West Coast Southern Total . .
31 136 & 86, 082 415, 117 24, 086 79, 636 167 501, 191) 103, 722 There were also thirty idle dredges upon the fields. The average yield per dredge was 3, 000, and the expenditure 2, 200.
While the tendency of recent construction has been to build still larger dredges, the pontoons commonly average from 80 to 100 feet in length, with a ladder capable of working to a depth of 25 to 35 feet.
What to read after Mines And Minerals of the British Empire Being a Description of the Historical?
You can find similar books in the "Read Also" column, or choose other free books by Ralph S G Stokes to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Through the skill of constructing engineers and operating employees the sphere of application has been extended to flats and banks beyond the possibilities of successful treatment in the ' boom ' days.
A most important event in the history of the industry was the installation of a dredge in 1894 with a tailings-elevator for the disposal of the waste gravel after treatment. This enabled the dredges to exploit much deeper ground and banks high above the water-level.
CHIEF MINERAL LOCALITIES 187 8.... The magnitude of operations at the present day may be shown by figures for 1906 extracted from a Report by the Inspecting Engineer of Mines for New Zealand : District.
No. Of Dredges.
Yield.
Dividends.
West Coast Southern Total . .
31 136 & 86, 082 415, 117 24, 086 79, 636 167 501, 191) 103, 722 There were also thirty idle dredges upon the fields. The average yield per dredge was 3, 000, and the expenditure 2, 200.
While the tendency of recent construction has been to build still larger dredges, the pontoons commonly average from 80 to 100 feet in length, with a ladder capable of working to a depth of 25 to 35 feet.
What to read after Mines And Minerals of the British Empire Being a Description of the Historical?
You can find similar books in the "Read Also" column, or choose other free books by Ralph S G Stokes to read onlineMoreLess
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