Examples of tree surgery, showing healing process after cutting out cMnk^rs, in 

 treatment of orchnnl trees. This treatment nn(h)ul)te(lly prolongs the life of the 

 trees. — I'ltDiiiiinipli Inj I' inf. Colliiix. 



Example of tree surgery, showing healing process after cutting out cankers in 

 treatment of orchard trees. Will prolong life of tree. — Photograph by Prof. 

 Collins. 



