EEA On 
PAGE. 
Plate XV. Transverse section of a canker-tree. Secundary burr- 
formation in the cortex. Central wood smooth . . …. 37 
Figure 1. The development of „peas” from dormant buds after 
HAR mi Gamen ENE aah 
Figure 2. Burr-formation as a result of pricking . . …. . . 35 
