A RARE PICTOGRAPH 



solved. On one page she shows the beetle 

 destroying the pine, but on another page she 

 shows how the beetle may be destroyed by 

 a parasite, thus giving a hint toward the 

 solution of all similar problems. Or, vary- 

 ing her problem and example, she shows man 

 how the sometimes odious law of contagion 

 may be craftily used (as he has learned to 

 use it with the "wilt disease") to put an end 

 to the devastations of the brown-tail moth. 



And while the entomologist is solving his 

 problems by pitting one destructive force 

 against another, the sociologist is hard at 

 work upon the far more knotty problem 

 unsolved through the ages of destroying 

 the parasites which attack the soul and body 

 of man himself. 



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