Hittel On Gold Mines And Mining
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In our eReader you can find the full English version of the book. Read Hittel On Gold Mines And 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 Hittel On Gold Mines And Mining
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All the dirt brought out in aweek can readily be washed in a day. The work of taking out thepay-dirt after the main tunnel has been cut, is called "drifting;" andthe holes made by the men engaged in it are termed "drifts. " The driftsare usually not so high as the tunnels. The large stones and barrendirt obtained in the drifts are piled up here and there to sustain theearth overhead. Sometimes wooden posts are likewise necessary.
_Shafts. _--Shafts are used in prospecting, and also in mining, w...herethe claims are deep and cannot be reached by either the hydraulicprocess or the tunnel. The prospecting shaft is sometimes sunk intohills supposed to be auriferous, where the shaft is far less expensivethan the tunnel. After the shaft demonstrates that the dirt is rich, and precisely the altitude at which it lies, a tunnel is cut to strikeit. The shaft may be the cheaper for prospecting, but the tunnel isusually the cheaper if any large amount of dirt is to be taken out.
The shaft is dug by one man in the hole, and one or two are employed ata windlass in hauling up the dirt.
What to read after Hittel On Gold Mines And Mining?
You can find similar books in the "Read Also" column, or choose other free books by John Shertzer Hittell to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
All the dirt brought out in aweek can readily be washed in a day. The work of taking out thepay-dirt after the main tunnel has been cut, is called "drifting;" andthe holes made by the men engaged in it are termed "drifts. " The driftsare usually not so high as the tunnels. The large stones and barrendirt obtained in the drifts are piled up here and there to sustain theearth overhead. Sometimes wooden posts are likewise necessary.
_Shafts. _--Shafts are used in prospecting, and also in mining, w...herethe claims are deep and cannot be reached by either the hydraulicprocess or the tunnel. The prospecting shaft is sometimes sunk intohills supposed to be auriferous, where the shaft is far less expensivethan the tunnel. After the shaft demonstrates that the dirt is rich, and precisely the altitude at which it lies, a tunnel is cut to strikeit. The shaft may be the cheaper for prospecting, but the tunnel isusually the cheaper if any large amount of dirt is to be taken out.
The shaft is dug by one man in the hole, and one or two are employed ata windlass in hauling up the dirt.
What to read after Hittel On Gold Mines And Mining?
You can find similar books in the "Read Also" column, or choose other free books by John Shertzer Hittell to read onlineMoreLess
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