CONTROL OF ANIMAL PARASITES 269 



While the study of these parasites of disease may seem 

 disagreeable at first, where can we find keener inspiration 

 than in the thought of their control by human cooperation 



Fi<;. 121. Class with state inspector; meats in cold storage 



and intelligence ? By this road only can mankind free itself 

 from these time-old and world-wide tormentors and sappers 

 of human life. So may even the parasites of the Pharaohs 

 help to teach us lessons in cooperative good will. 



