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Show Circular Flues Safest; Cleaning Is Easy, Cheap Circular flues keep chimneys reasonably rea-sonably clean, according to the Holland Hol-land Institute of Thermology of Holland, Hol-land, Mich. In localities where soft coal or wood are need for fuel It has been found that soot accumulates accumu-lates In the corners of square or oblong chimneys, which If not re-O'Oved re-O'Oved by periodic cleaning Is likely like-ly to cause Ores that may have disastrous disas-trous effects. Chimney-cleaning is a nuisance to the householder who tries to do it himself, but It is prtanued quickly, inexpensively and without muss by a modern type of vacuum cleaner built especially for chimneys and heating plants. |