PREVENTION 1!Y FARMINC. METHODS 



25 



sary to keep the insect down, unless by carelessness it were 

 permitted to return unmolested to its old haunts. Immeasurable 

 benefits would undoubtedly accrue by the subordination of self- 

 interest for the common weal. Indeed this subordination is only 

 apparent and it has been pointed out that one of the best, as it 

 is the noblest, methods of self-help consists in helping our 

 fellow men. 



Fig. 21)'.— A simple coal-tar pan to be drawn by hand 1 After Riley) 



