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Scientific American, Vol. 29, No. 12 (1873) (1873)
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without injury to health water up to a certain hight, they can be shut down by means or property. In many instances, otherwise most desirable Fie. 2. ‘of a valve measuring a few inches square. The gas issuing and valuable suburbs have been monopolized by these estab- forth out of the furnace mouth… … © 1873 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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