nnexed engraving represents the Firmenich safety of boilers of this description have been in use, we are in- temperature of a boiler furnace is about 2,000° Fah., while boiler, which is claimed to contain a number of important formed, for years, and are never cleaned, making steam as that of steam… … usual way. Large manholes are provided in all the drums The Virginia Gold Mines. Fig. 2.—THE FIRMENICH SAFETY STEAM BOILER. to adinit of easy access to the interior of the boiler. Mr. J. E. Emerson, a valued correspondent of this jour- Among the advantages claimed by the manufacturers are nal, who…
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