76 HOUSEHOLD INSECTS 



times, sucking his blood and thereby getting the malarial 

 germ into their stomachs. These identical mosquitoes 

 were then sent to London, England, and there allowed 

 to bite Manson. In the regular course of time, he was 

 taken with a well-marked case of malaria and, moreover, 

 when his blood was examined the well-known germs were 

 found in the red corpuscles. Finally, the thing was done. 

 It had been actually proved that men could keep free 

 from malaria by keeping free from mosquitoes and their 

 bites, and lastly it had been proved that the bites of 

 Anopheles mosquitoes would actually produce malaria 

 in a man not previously suffering from it. 



THE REAL NATURE OF MALARIA 



Within the last generation tremendous strides have been 

 made in the realms of both pure and applied science ; 

 and if more progress can be said to have been made in 

 one domain of science than in another, it will have to be 

 said of that of medicine. Moreover, with all the remark- 

 able advances made in medicine perhaps no late discovery 

 in that field has aroused more general interest than the 

 discovery in 1880 of the causal germ of malaria by the 

 French physician Laveran, together with the later demon- 

 stration by Ross that this germ is communicated to human 

 beings through the agency of certain kinds of mosquitoes. 

 When Laveran announced that he had discovered a 

 minute organism living in the red cells of the blood and 

 destroying them, thereby causing the disease, malaria, 

 he was not believed. Later, however, his statements 

 were corroborated by other reputable investigators, who 

 had without doubt seen this same tiny parasite in the 



