266 



THE GUIDE TO NATURE 



CLEANING THE CAVITY. 



bore a hole in a tooth and fill it with 

 any kind of hardening material, but 

 such crude and unscientific treatment 

 would result only in failure. I have 

 greatly enjoyed watching The Frost & 

 Bartlett Company's men treat a sick 

 or injured tree. Every step in the pro- 

 cess shows that they understand their 

 profession, and an examination of work 

 done by them three or four years ago 

 shows by its result that their method 

 is the right one. One of the most con- 

 vincing proofs of this is the manner in 

 which new wood is formed around the 

 edge of the excavation made by their 

 tools. This growth continues and in 

 time would nearly if not completely 

 cover the cement. The accompanying 

 illustrations show more impressively 

 than words can do the principal steps 

 in the work, as well as the skill with 

 which the work is performed. We cor- 

 dially recommend the firm to all lovers 

 or owners of trees that need attention. 



INSPECTING THE WORK. 



