he operation of cleaning, after it is once 81 in position ready for work. The only parts of the AN IMPROVED BOILER TUBE CLEANER. cleaner that show any wear with long use are the The illustrations represent a boiler tube cleaner so chisels or cutting tools, and as they last well and are constructed… … BOILER TUBE CLEANER.—FIG. 3. caleulating standpoint of commercial loss. He says: ‘The economic value of an individual is what it has or less contact with the inner surface of the tube, for cost his family, the community or the State for his removing scale or other matter, the cutting edges of…
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