PLATE I. 



Fig. 1. — Green wood apple cuttings, showing callus formation. From left to right, Yellow 

 Transparent, Fall Pippin, Red Astrachan, Bough, Ben Davis, Wagener. 



Fig. 2. — Matching cambium in root grafts: (a) one side only; (6) both sides only; (c) top 

 only; (d) bottom only; (e) perfectly matched. 



