of repairs with cast brass for zontal air heating drums and a series of nearly vertical large and valuable castings which cannot well be air inlet and heating pipes, which connect the drums spared while new ones are procured, such as cylinder with the external air through suitable openings made… … metal runs and forms lugs, making a firmer connec- This invention has been patented by Mr. D. W. tion between the new and the old parts, though the McKinnon, of North Sydney, Nova Scotia, Canada. OASES & CAMP'S HOT AIR FURNACE. chief reliance is on the shrinking of the new casting around the end of…
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