The Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy, &c., &c, Том 71856 |
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Стр. 13
... bottom of the other hydro - carbonaceous spirituous substances , on which , with the exception of camphole , it acts much less powerfully . I proceed now to the application of these facts to the purifica- tion of the different oils and ...
... bottom of the other hydro - carbonaceous spirituous substances , on which , with the exception of camphole , it acts much less powerfully . I proceed now to the application of these facts to the purifica- tion of the different oils and ...
Стр. 20
... bottom of the boiler , and then close the neck connected with the upper con- denser , and open the other neck of the retort which is directly connected with the still - worm , and then distil the oil over ; or I change the outlet in the ...
... bottom of the boiler , and then close the neck connected with the upper con- denser , and open the other neck of the retort which is directly connected with the still - worm , and then distil the oil over ; or I change the outlet in the ...
Стр. 26
... bottom of the current . The fact is well known that gold leaf is easily wafted away by a very light current of air ; if the gold can thus be suspended in so light a fluid as the atmosphere , it certainly can easily be washed away in a ...
... bottom of the current . The fact is well known that gold leaf is easily wafted away by a very light current of air ; if the gold can thus be suspended in so light a fluid as the atmosphere , it certainly can easily be washed away in a ...
Стр. 29
... about twelve inches in height is placed , forming a large tub , of which the stone bed constitutes the bottom . Into VOL . VII . - 2 this basin the ore is thrown by small portions from Gold Ores and their Working . 29.
... about twelve inches in height is placed , forming a large tub , of which the stone bed constitutes the bottom . Into VOL . VII . - 2 this basin the ore is thrown by small portions from Gold Ores and their Working . 29.
Стр. 32
... bottom of the vat , from which it is easily gathered after drawing off the water . From the above brief outline it will be perceived that the Mexican process involves a continued succession of " rests " for the ores ; allowing time for ...
... bottom of the vat , from which it is easily gathered after drawing off the water . From the above brief outline it will be perceived that the Mexican process involves a continued succession of " rests " for the ores ; allowing time for ...
Другие издания - Просмотреть все
The Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy ..., Том 3 Полный просмотр - 1854 |
The Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy ..., Том 4 Полный просмотр - 1855 |
The Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy ..., Том 8 Полный просмотр - 1857 |
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adit amalgamation amount anthracite appears average basin Bessemer's bituminous coal blast furnace boiler boshes bottom caloric Canal cannel coal carbonic acid cast cent cinder Coal Trade coke cold blast combustion Company considerable consumption containing copper cost crude iron cwts cylinder degs deposits depth diameter Dowlais effect engine feet fuel gases gold gossan hearth heat hot blast inches increase Lake Superior Lehigh Lehigh Valley Railroad lime limestone lode malleable iron manufacture mass materials metal miles mill mineral mines mountains naphtha nearly obtained operation oxide pig iron portion present produced proportion pyrites quantity quartz Railroad reduced region rich river road roasting rock sand sandstone seams shaft side silica silver smelting specific gravity specimens stamps steam steel strata sulphate sulphur sulphuret surface temperature thickness throat tion tons tuyeres upper vein washing yield
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Стр. 185 - That the section number sixteen, in every township, and where such section has been sold, granted or disposed of, other lands equivalent thereto and most contiguous to the same, shall be granted to the inhabitants of such township, for the use of schools.
Стр. 185 - The appropriation of public lands for that object became a fundamental principle, by the Ordinance of 1787, which settled terms of compact between the people and States of the Northwestern Territory, and the original States, unalterable except by consent.
Стр. 186 - That sections numbered sixteen and thirty-six in every township of public lands in said State, and where either of said sections, or any part thereof, has been sold or otherwise disposed of, other lands, equivalent thereto, and as contiguous as may be, shall be granted to said State for the use of schools.
Стр. 400 - And thus it will be seen, that by a single process, requiring no manipulation or particular skill, and with only one workman, from three to five tons of crude iron...
Стр. 420 - ... least. Whenever a garnet or a lump of quartz was imbedded in compact feldspar and favorably presented to the action of the sand, the feldspar was cut away around the hard mineral, which was thus left standing in relief above the general surface. A portion however, of the feldspar, on the lee side of the garnets, being protected from the action of the sand by the superior hardness of the gem, also stood out in relief, forming an elevated string, osar-like, under their lee. When the surface acted...
Стр. 400 - Л large portion of this metal is, however, recoverable by treating with carbonaceous gases the rich oxides thrown out of the furnace during the boil. These slags are found to contain innumerable small grains of metallic iron, which are mechanically held in suspension in the slags, and may be easily recovered.
Стр. 423 - Strength and other Properties of Metals: Reports of Experiments on the Strength and other Properties of Metals for Cannon. With a Description of the Machines for testing Metals, and of the Classification of Cannon in service. By Officers of the Ordnance Department US Army. By authority of the Secretary of War. Illustrated by 25 large steel plates. In one volume, 4to. . $10.00 SULLIVAN. — Protection to Native Industry. By Sir EDWARD SULLIVAN, Baronet, author of " Ten Chapters on Social Reforms.
Стр. 401 - I have described will have no hard or steely parts, such as is found in puddle iron, requiring a great amount of rolling to blend them with the general mass, nor will such ingots require an excess of rolling to expel cinder from the interior of the mass, since none can exist in the ingot, which is pure and perfectly homogeneous throughout, and hence requires only as much rolling as is necessary for the development of fibre ; it therefore follows that, instead of forming a merchant bar or rail by...
Стр. 400 - ... into the condition of several piles of malleable iron, in from thirty to thirty-five minutes, with the expenditure of about one-third part the blast now used in a finery furnace with an equal charge of iron, and with the consumption of no other fuel than is contained in the crude iron.
Стр. 59 - Although the art of building has been practised from the earliest times, and constant demands have been made, in every age, for the means of determining the best materials, yet the process of ascertaining the strength and durability of stone appears to have received but little definite scientific attention, and the commission, who...