No. 8. A large area of disease pustules on a smooth-barked orchard tree. Photo- 

 graph by Prof. Collins. 



No. 9. Bark removed from over a canker, showing the cracks at the centre and 

 the fan-shaped spread of the yellowish fungous mycelium; also, at the lower edge, 

 the circular margin of the disease. Photograph by Prof. Collins. 



