A Descriptive Treatise On Mining Machinery, Tools, And Other Appliances Used in Mining
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In our eReader you can find the full English version of the book. Read A Descriptive Treatise On Mining Machinery, Tools, And Other Appliances Used in 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 A Descriptive Treatise On Mining Machinery, Tools, And Other Appliances Used in Mining
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Some run with as low a speed as.l5 drops per minute ; others as high as 40 ; while the average will probably not exceed 28. The faU is from 12 to 18 inches. The revolving stamp is in general use. The high mortars, having the bottom and sides cast in one piece, so generally used in Nevada and California, are not found in Colorado.
The mortar in common use in this territory is a simple iron trough, 4 or 5 feet long, 12 or 14 inches wide, and 9 inches deep, cast with a solid bottom which should be... 9 or 10 inches thick, but is often less. It is laid on wooden foundations, made sometimes, like those already described, of sound timbers set vertically, their ends resting on firm ground ; or, more commonly, on a long horizontal mortar-block, that rests on other cross-timbers, placed horizontally. The bottom of the mortar on the inside contains recesses into which the dies sink and are secured. The latter have usually flat octagonal bases with a wearing surface rising above them of cylindrical form, corresponding to that of the shoe, usually 8 inches in diameter.
What to read after A Descriptive Treatise On Mining Machinery, Tools, And Other Appliances Used in Mining?
You can find similar books in the "Read Also" column, or choose other free books by André, George Guillaume to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Some run with as low a speed as.l5 drops per minute ; others as high as 40 ; while the average will probably not exceed 28. The faU is from 12 to 18 inches. The revolving stamp is in general use. The high mortars, having the bottom and sides cast in one piece, so generally used in Nevada and California, are not found in Colorado.
The mortar in common use in this territory is a simple iron trough, 4 or 5 feet long, 12 or 14 inches wide, and 9 inches deep, cast with a solid bottom which should be... 9 or 10 inches thick, but is often less. It is laid on wooden foundations, made sometimes, like those already described, of sound timbers set vertically, their ends resting on firm ground ; or, more commonly, on a long horizontal mortar-block, that rests on other cross-timbers, placed horizontally. The bottom of the mortar on the inside contains recesses into which the dies sink and are secured. The latter have usually flat octagonal bases with a wearing surface rising above them of cylindrical form, corresponding to that of the shoe, usually 8 inches in diameter.
What to read after A Descriptive Treatise On Mining Machinery, Tools, And Other Appliances Used in Mining?
You can find similar books in the "Read Also" column, or choose other free books by André, George Guillaume to read onlineMoreLess
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