Coal, Iron, and Oil, Or, The Practical American Miner: A Plain and Popular Work on Our Mines and Mineral Resources, and a Text-book Or Guide to Their Economical DevelopmentBenjamin Bannan, 1866 - 16 σελίδες |
Περιεχόμενα
| 17 | |
| 29 | |
| 30 | |
| 35 | |
| 46 | |
| 48 | |
| 58 | |
| 63 | |
| 221 | |
| 231 | |
| 240 | |
| 254 | |
| 260 | |
| 266 | |
| 269 | |
| 285 | |
| 66 | |
| 82 | |
| 91 | |
| 99 | |
| 104 | |
| 113 | |
| 121 | |
| 129 | |
| 138 | |
| 145 | |
| 155 | |
| 166 | |
| 172 | |
| 178 | |
| 185 | |
| 187 | |
| 201 | |
| 298 | |
| 305 | |
| 317 | |
| 338 | |
| 361 | |
| 382 | |
| 393 | |
| 411 | |
| 429 | |
| 450 | |
| 486 | |
| 531 | |
| 553 | |
| 569 | |
| 610 | |
| 651 | |
| 672 | |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
Alleghany coal-field amount angle anthracite coal anthracite coal-fields anthracite regions anticlinals Appalachian Azoic basin bituminous bituminous coal Black Creek Broad Mountain Broad Top Buck Mountain cannel carbon carbonic acid Carboniferous cent Coal Company coal formations coal measures coal-basins coal-beds coal-seams coke colliery conglomerate deep deposits depth developed distance district east eastern England exist extent fact feet in thickness feet thick figure furnace gneiss granite heat hematites inches increase iron Kanawha labor Lehigh less limestone Locust Mountain lower Mahanoy Mammoth manufacturing metal miners mines mode Nanticoke north dip Ohio operation outcrops Paleozoic Pennsylvania perpendicular Pittston portion Pottsville present Primrose production Railroad red-ash Ridge River rocks sandstones Schuylkill Scranton seams shaft shales Shamokin side slate slope south dip square miles strata surface synclinal Tamaqua tion tons tunnel undulations upper Valley vapors veins vertical section vicinity Virginia volcanic western white-ash workable Wyoming
Δημοφιλή αποσπάσματα
Σελίδα 130 - ... quantity, often less than 5 per cent., of ash. The ash is often white. Most of the coals from the inland counties readily show white lines on the edges of the beds, owing to the presence of argillaceous earth which effloresces. In this respect they are less adapted for general use than the Newcastle coal, but many of them are of excellent quality. Next in order to the coals of the Midland counties generally are those of some parts of North Wales and many districts in South Wales, which contain...
Σελίδα 643 - When in regular operation, these vessels are capable of producing fully 6000 tons of steel weekly, or equal to fifteen times the entire production of cast steel in Great Britain before the introduction of the Bessemer process. The average selling price of this steel is at least .£20 per ton below the average price at which cast steel was sold at the period mentioned. With the present means of production, therefore, a saving of no less than £6,240,000 per annum may be effected in Great Britain alone,...
Σελίδα 111 - Made the experiment of burning the common stone coal of the valley, in a grate, in a common fire-place in my house, and find it will answer the purpose of fuel, making a clearer and better fire at less expense than burning wood in the common way.
Σελίδα 21 - Ibs. avoirdupois, travel with this 150 yards up the slope of the coal below ground, ascend a pit by stairs 117 feet, and travel upon the hill 20 yards more to where the coals are laid down. All this she will perform no less than twenty-four times as a day's work.
Σελίδα 130 - ... required. Such coals exist not only in England, but in France, Saxony, and Belgium to some extent. They are often tender or powdery, dirty-looking, and of comparatively loose texture, but they often stand exposure to the weather without alteration or injury. They are called steam...
Σελίδα 328 - IB and its subdivisions, as it appears to be. From all the local sections of the Pennsylvania Survey, two ascertained data are especially worth mentioning. 1st. The reliability of our Curlew limestone, which, in Pennsylvania, is called Freeport limestone, and is generally placed 6 to 15 feet above our No. 3 coal : 2d. The consistency of the ferriferous limestone between No.
Σελίδα 67 - ... that has risen to the surface in pursuit of its prey, or when a sudden breeze stirs the hot air, and shakes the fronds of the giant ferns, or the catkins of the reeds. The wide continent before us is a continent devoid of animal life, save that its pools and rivers abound in fish and mollusca, and that millions and tens of millions of the infusory tribes swarm in the bogs and marshes. Here and there, too, an insect of strange form flutters among the leaves.
Σελίδα 379 - The coal measures of Iowa are shallow, much more so than those of the Illinois coal field. They seem attenuated as towards the margin of an ancient carboniferous sea, not averaging more than fifty fathoms in thickness. Of these the productive coal measures are less than a hundred feet thick. The thickest vein of coal detected in Iowa, does not exceed from four to five feet, while in Missouri some reach the thickness of twenty feet and upwards. In quality the coal is, on the whole, inferior to the...
Σελίδα 507 - ... performed any other way. It is a common practice in mining to take the angle of underlaying shafts with the cover of the dial and a plumb-line ; and in short drafts, with great care, this method may answer well enough : but when any very important work is to be performed, we would strongly recommend the application of a more perfect instrument for ascertaining the angle; for it...
Σελίδα 329 - Lick coal,' from its locality near the romantic falls of that name in Somerset. This bed, which is the upper Freeport bed of the Kiskiminetas and Alleghany Rivers, seems to be represented by the large upper coal of the Kanawha and Coal Rivers of Virginia, and by the great bed at Karthause and Clearfield to the north. It marks the upper limit of the lower coalbeds, and is covered at no great distance by the remarkable sandstone strata hereafter to be discussed [the Mahoning sandstone].