Photo: The Fleet Agency. 



TREE SURGERY 



Modern tree surgeons prolonging the life of valuable trees by chiselling out the decayed part. After treatment with disin- 

 fectant and water, the cavity is filled with a concrete preparation. This is possible because the bulk of the central wood is not 

 necessary for carrying water and may be removed if the tree is mechanically strong enough. The removal of the decayed part 

 prevents infection spreading. 



