THE TREE DOCTOR 



227 



any institution of the kind in any other State. Second. Giving 

 that which is reliable shields from the humbugs that are abroad 

 in the land. I frequently get letters announcing that the writer 

 has discovered some wonderful remedy for "plant lice," or some- 

 thing else, and suggesting that "there is money in the sale of 

 it," and that he would be glad if I would introduce it, etc. (lib- 

 eral commissions of course offered). With the highest apprecia- 

 tion of the work of the Ohio Experiment Station, I give you its 

 formulas, and suggest that you heed all "cautions" given in the 

 application thereof. They are found on the following pages; 

 "Spray Calendars" and all. 



