THE TREE DOCTOR 



201 



bark should be rubbed off with an old curry-comb, a good em- 

 ployment for children (Photo 186.) The Elms, seen in Photo 

 191, have been thoroughly cleaned and were treated to the 

 "lime, sulphur and salt" formula, for the destruction of insects. 

 A full list of formulas for destroying insect pests is given in the 



Photo 186 

 Rubbing off Old, Loose Bark. 



last pages of this work, reproduced from one of the bulletins 

 of the Ohio Experiment Station. 



The "woodsman" has not been the only destroyer of trees. 

 The average "sportsman" and the boy with the "Flobe-rt Rifle," 

 unintentionally, have been their enemy, by killing their protec- 

 tors, the birds. Should the increase of the Web-worm continue 



