(under subclass 412) Subject matter in which a conduit is in circuit with a boiler, with means for introducing feed water into the circuit, thereby mixing the feed with the boiler water before introduction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
398, 403 and 415, and structural subclasses of boilers generally, for the special structure of boilers having means for introducing feed water into certain parts of the boiler circulating system.
