BRIDGE GRAFTING 



105 



and the ends untied. These enlarge as they grow, getting 

 strong enough in time to support the limbs and do away 

 with props. 



FIG. 52. Inarching. 



Bridge Grafting. Often trees may be injured by acci- 

 dents, such as fire, carelessness in cultivating or plowing, 

 or by mice and rabbits during the winter. Such injuries 

 weaken the tree by cutting off part of the food supply 



