MALARIA AND THE MALARIAL PARASITE. 317 



us to understand the pathology and etiology of malaria. Secondly, they 

 help us in diagnosis. Thirdly, our knowledge of the parasite is in- 

 valuable in directing treatment. Lastly, a knowledge of the life-history 

 of the malarial parasite is of extreme value for the prevention of 

 malarial disease, for could we by mechanical or other arrangements 

 prevent the mosquito attacking the human body, we could prevent 

 the malarial parasites from entering the human body; or if we could 

 abolish the mosquito by drainage or other means from a country, then 

 we might be sure that we would abolish the malaria of that country also. 

 Attempts are being made to solve these practical problems. At the 

 present moment such attempts are being actively made in Eome by 

 Professor Celli and elsewhere by others. I have no doubt that in the 

 course of a few years we shall get some very valuable results in this 

 direction and that, thanks to this new-born knowledge about the 

 malarial parasites, better times are rapidly approaching for malarial 

 countries. 



