230 BIOLOGY FOR BEGINNERS 



occurred in Havana and none at all in 1902. The terrible curse 

 of the tropics was wiped out. 



Major Reed writes " In my opinion this exhibition of moral 

 courage has never been surpassed in the Army of the United 

 States." 



The history of medicine and sanitation is full of such examples 

 of quiet heroism, where men have offered themselves to suffering 



FIG. 80. A female mosquito, T, incidens; note the thread-like 

 antennae. From Doane. 



and death far worse than is incurred in battle and without the 

 excitement of war or the encouragement of popular applause. 



The conquest of malaria was brought about in similar manner, 

 by the careful research and courageous experiment of English 

 and Italian doctors. As late as 1894 the Standard Dictionary of 

 Medicine said that malaria was caused by "an earth-born poison 

 generated in the soil " and, as its name signifies, was associated 

 with bad air especially night air. 



