Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V
Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V
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In our eReader you can find the full English version of the book. Read Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V 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 Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V
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To quickly assess the difficulty of the text, read a short excerpt:
Or W N. Or S.
46 45 158 OF THE PEODUCE OF SEAMS OF COAL.
(61. ) From the various experiments which have been made on the produce of tracts of coal mines, in the neigh- bourhood of Newcastle-upon-Tyne, it has been found that a cubic yard of coal weighs -936 of a ton ; therefore, an acre of that stratum, 1 foot thick, will produce (if all wrought out) 1510 tons; consequently an equal area of stratum, 2, 3, 4, &c. , feet in thickness, will produce 2, 3, 4, &c. , times the quantity of tons of coal ...that a seam of 1 foot thick will produce.
From this datum easy rules may be constructed for the use of the practical miner, which with facility may be retained for application in calculating the produce of seams of any given thickness in tons.
To find the number of tons of coal contained per acre by a seam of any given thickness.
EULE I. Multiply 1510 by the thickness or height of the seam in feet, and the product will be the number of tons of coal contained in an acre of that seam.
To find the number of tons of coal produced per acre by a seam, where part thereof is only worlced or taken away, the other part being left as a support to the roof.
What to read after Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Fenwick to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Or W N. Or S.
46 45 158 OF THE PEODUCE OF SEAMS OF COAL.
(61. ) From the various experiments which have been made on the produce of tracts of coal mines, in the neigh- bourhood of Newcastle-upon-Tyne, it has been found that a cubic yard of coal weighs -936 of a ton ; therefore, an acre of that stratum, 1 foot thick, will produce (if all wrought out) 1510 tons; consequently an equal area of stratum, 2, 3, 4, &c. , feet in thickness, will produce 2, 3, 4, &c. , times the quantity of tons of coal ...that a seam of 1 foot thick will produce.
From this datum easy rules may be constructed for the use of the practical miner, which with facility may be retained for application in calculating the produce of seams of any given thickness in tons.
To find the number of tons of coal contained per acre by a seam of any given thickness.
EULE I. Multiply 1510 by the thickness or height of the seam in feet, and the product will be the number of tons of coal contained in an acre of that seam.
To find the number of tons of coal produced per acre by a seam, where part thereof is only worlced or taken away, the other part being left as a support to the roof.
What to read after Elementary And Practical Treatise On Subterraneous Surveying And the Magnetic V?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Fenwick to read onlineMoreLess
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