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. 1882 Excerpt: ...as fully as might be done. Instead of putting copper into the pots, they really do not know what they put in. They put something in that has the color of Copper, and something which they think is Zinc. In the furnace they have a melting-pot, and to save money and time and some other things, they put two or three ingots ...
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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. 1882 Excerpt: ...as fully as might be done. Instead of putting copper into the pots, they really do not know what they put in. They put something in that has the color of Copper, and something which they think is Zinc. In the furnace they have a melting-pot, and to save money and time and some other things, they put two or three ingots of copper inside the furnace on top of the coal around the pot. Somctime.s free oxygen gets into that furnace, and sometimes it does not. The copper on the coal gets red hot, and sometimes it oxidizes, and when that goes into the pot, the oxygen is retained by the metal that is produced. I never knew of a brass manufacturer having a piece of zinc analyzed. Then, as to the matter of annealing: when there is a great deal of metal to be annealed, they pile up perhaps twentyfive or thirty sheets on top of each other. The top sheet may or may not be colder than the bottom, but no one who has had any experience at all in the manufacture of metals--in the iron trade--would expect for a moment to get a sheet uniformly annealed in that way. Those sheets remain in the annealing furnace a longer or a shorter time, and the man who feeds the fire feeds it according to his judgment. Sometimes he gets a big fire and sometimes he does not. Another thing in connection with the manufacture of brass, is scrap. All manufacturers use their own scrap, and scrap which comes to their works. The scrap is of a very miscellaneous character, and it is put into a big iron mortar and pounded into a mass that will fit a pot. In regard to the Siemens furnace for the refining of copper, at one of the works in the Naugatuck Valley they decided to put up such a furnace for that purpose. I went to France and saw some Siemens furnaces that had been in successful use for four yea...
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Add this copy of Metallurgical Notes and Essays: 1876-92] to cart. $65.09, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2010 by Nabu Press.