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Show A Good Pruning Suggestion. To make large wounds heal quickly, first see that the trees are in a vigorous vigor-ous growing condition. When a large cut must be made, paint the wood with white lead, then cover most of It with a piece of zinc. The healing tis- ' sue, called the "callus," will start from the edges of the wound. In the course of time this callus will fold Dver sufficiently to cover the wound. Its spread may be hastened by slit-ling slit-ling the callus with the point of a lharp knife once each year. Early in the summer is the best time to do this, as the callus tissue is most active at that time. |