IO MALARIA 



belongs entirely to Dr. C. L. A. Laveran, a French 

 army surgeon in Algeria, who made the discovery 

 in 1880. The fact that certain kinds of mosquitoes 

 are the transmitters of this causative organism was 

 discovered by the Englishman, Major Ronald Ross, 

 while stationed in India. This discovery was made 

 in 1898, and mankind owes no greater debt to a fellow 

 man than this. 



Circumstantial Evidence. — A several years' resi- 

 dence in a notoriously malarial district, during the 

 8o's and early 90's, has given the author much cir- 

 cumstantial evidence at least to incriminate the mos- 

 quito, though this was looked upon then as an inci- 

 dental matter. Immediately following the great floods, 

 when the valleys were inundated during late February 

 and March and the receding water left behind it innu- 

 merable pools and filled cellars and cesspools, there was 

 much more malaria than usual, a fact always predicted. 

 Coincidentally mosquitoes were unusually abundant, 

 and especially the noiseless kind. Exceedingly warm, 

 moist seasons always brought more malaria, while 

 a prolonged drought was said to kill the disease, as dia 

 the approach of cold weather. The connection be- 

 tween the weather and relative abundance of mos- 

 quitoes can easily be made. 



Furthermore, observations covering several years' 

 residence in California, during which time the state 

 has been carefully traversed several times, bring 

 home the fact that the southern part of the state is 



