OUTDOORSCapital City Weekly New topics come my way instigated by readers. Some questions continue to plague us. Harvey Gilliland of Petersburg wonders about the barrels distributed on the peak of the roofs of old buildings, especially canneries but occasionally on a sawmill. We speculate that these were used to collect water. But for what purpose? Fire protection? Imagine a man seeing fire inside a building, racing to find a ladder and scrambling up the steep roof to dump the barrels. "That amount of water would be insignificant and most of it would run fruitlessly down the roof," Harvey speculates. Possibly it could put out a spark on the roof that had not fully developed in an all consuming fire. However the placement of the barrels, so far apart, dampens that theory. Harvey suspects that there is hardly anyone around that can answer our puzzlement. Prove us wrong.