boils | scends through the vertical pipes, F, into a second annular } to the cistern in order to warm the water therein to such a when the tension of its vapor is equal to the pressure it sup- | receptacle, G, from which it exits by the conduit, H. The| degree as may not interfere with the… … on. Every apparatus, steam, emerging, therefore, having for FRANCE’S FEED WATER HEATER AND PURIFIER. acts upon the impu- its object the heating of the feed water of boilers, should, | have closed extremities at points respectively opposite those | rities packed on the inner surface of tubes, C. The…
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