Principles of Metal Mining
Principles of Metal Mining
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In our eReader you can find the full English version of the book. Read Principles of Metal 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 Principles of Metal Mining
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Lamps. In some of the mines of the north of England, South Wales, and Scotland, and in Saxony and other parts of Germany, small metal lamps are used, in which colza, rape, or other oil is burnt. These lamps are made with a small hook for attachment to the miner's hat, and a spike which may be placed in a joint of the rock when the place of work is reached. The light given by such lamps is not equal to that of good candles, and this is probably the reason why they have not found favour in Cornwa...ll; but the cost does not exceed from f d. To Id. Per shift or core of eight hours, which is about one-half the cost of candles. Within the last few years, lamps for burning paraffin and petroleum oils underground have been devised. The author has not seen any of them; but they are well spoken of, as they give a good light at little cost. Hitherto, 122 PRINCIPLES OP METAL MINING.
however, they have not been made to burn without much more smell than either oil lamps or candles.
153. Coal gas was first utilised in Cornwall, by Murdoch, in or about 1792, when he lit up his workshops at Red- ruth with gas.
What to read after Principles of Metal Mining?
You can find similar books in the "Read Also" column, or choose other free books by J H Joseph Henry Collins to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Lamps. In some of the mines of the north of England, South Wales, and Scotland, and in Saxony and other parts of Germany, small metal lamps are used, in which colza, rape, or other oil is burnt. These lamps are made with a small hook for attachment to the miner's hat, and a spike which may be placed in a joint of the rock when the place of work is reached. The light given by such lamps is not equal to that of good candles, and this is probably the reason why they have not found favour in Cornwa...ll; but the cost does not exceed from f d. To Id. Per shift or core of eight hours, which is about one-half the cost of candles. Within the last few years, lamps for burning paraffin and petroleum oils underground have been devised. The author has not seen any of them; but they are well spoken of, as they give a good light at little cost. Hitherto, 122 PRINCIPLES OP METAL MINING.
however, they have not been made to burn without much more smell than either oil lamps or candles.
153. Coal gas was first utilised in Cornwall, by Murdoch, in or about 1792, when he lit up his workshops at Red- ruth with gas.
What to read after Principles of Metal Mining?
You can find similar books in the "Read Also" column, or choose other free books by J H Joseph Henry Collins to read onlineMoreLess
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