ISBN: 9781147571608

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustra… mais…

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1841 Excerpt: .of the coal in working, that they present a peculiarly grim aspect; and this effect is not a little heightened by the flaring of their lights, and the dark hue of the mine on every side. In some collieries they use small, and in others thick candles; more commonly oil lamps; but This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1841 Excerpt: .of the coal in working, that they present a peculiarly grim aspect; and this effect is not a little heightened by the flaring of their lights, and the dark hue of the mine on every side. In some collieries they use small, and in others thick candles; more commonly oil lamps; but generally in the north, and where fire-damp abounds, Sir Humphrey Davy's wire-gauze lanthorn (which will afterwards be described) is adopted, instead of the flint and steel mill formerly employed in the dangerous workings. Of course, where gunpowder is used, candles are also in use; as any collections of gas that would explode by the flame of the latter, would as certainly be ignited by Fig 35. the firing of the former. The figure annexed is a side view of a steel mill of simple construction. A B is a frame of iron, in which the brass cog wheel c and In the Life of Brownrigg, the steel mill is said to have been the invention of a Mr. Carlisle Spedding, of Whitehaven, to whom the same authority attributes the contrivance of wooden waggon-ways. THE STEEL MILL. 241 the steel mill D, are fixed by their axles, so that the teeth of the former take into the pinion E of the latter, thus producing a rapid revolution of the steel periphery, against which the piece of flint is applied, and a stream of sparks elicited. The machine is put in motion by means of the winch handle F. These mills vary in size, as well as in form; in that form which the sketch was taken, the wheels were about six inches in diameter. It is sometimes fixed upon the breast of the pitman, and there worked by him; in other cases, it is placed in the most convenient situation for use. Horses, as intimated in the last Chapter, and in some places asses, on account of their size, are employed in the workings to draw the Books, Literary Collections~~General, History-and-Description-of-Fossil-Fuel-the-Collieries-and-Coal-Trade-of-Great-Britain~~John-Holland, 999999999, The History and Description of Fossil Fuel, the Collieries, and Coal Trade of Great Britain, John Holland, 1147571600, Nabu Press, , , , , Nabu Press<

ISBN: 1147571600

[EAN: 9781147571608], Neubuch, JOHN HOLLAND,SCIENCE AND MATH, This item is printed on demand. Paperback. This is an EXACT reproduction of a book published before 1923. This IS NOT an OCRd… mais…

[EAN: 9781147571608], Neubuch, JOHN HOLLAND,SCIENCE AND MATH, This item is printed on demand. Paperback. This is an EXACT reproduction of a book published before 1923. This IS NOT an OCRd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. This item ships from La Vergne,TN.<

ISBN: 1147571600

Taschenbuch, [EAN: 9781147571608], Nabu Press, Nabu Press, Book, [PU: Nabu Press], Nabu Press, 56047011, Fachbücher, 56517011, Agrarwissenschaften, 56779011, Archäologie, 56507011, Astron… mais…

Taschenbuch, [EAN: 9781147571608], Nabu Press, Nabu Press, Book, [PU: Nabu Press], Nabu Press, 56047011, Fachbücher, 56517011, Agrarwissenschaften, 56779011, Archäologie, 56507011, Astronomie & Raumforschung, 56172011, Bildung & Erziehung, 56458011, Biowissenschaften, 56048011, Chemie, 56534011, Essays & Kommentare, 56177011, Evolution, 56192011, Experimente, Instrumente & Messungen, 56092011, Geowissenschaften, 56204011, Geschichte & Philosophie, 56214011, Mathematik, 56432011, Nachschlagewerke, 56375011, Physik, 56441011, Technologie, 56453011, Verhaltensforschung, 54071011, Genres, 52044011, Fremdsprachige Bücher<

ISBN: 9781147571608

Paperback, [PU: BiblioLife, LLC], This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, erra… mais…

Paperback, [PU: BiblioLife, LLC], This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book., Science: General Issues<