MAN’S FIGHT AGAINST MICROBES 
93 
years of labor and the best American engineer¬ 
ing. Moreover, the Canal Zone had become a 
safe place in which to live. Man with a micro¬ 
scope had won. But at what great cost! Thou¬ 
sands of men and millions of dollars had been 
given in the battle with the mosquito before the 
American men began their work. However, 
if you go to the Canal Zone today, you will find 
a beautiful and healthful country made from 
what once was one of the most unhealthful 
places in the world. The people have learned 
to keep their land free of swamps where the 
mosquito once could grow so rapidly. Malaria 
is no longer feared. In fact, the city of Panama 
is one of the most healthful cities in the world. 
We must not imagine that we know all about 
microbes and their actions or that the fight 
against the attacks of disease-germs is won. 
To be sure, the world has learned many things 
about microbes. But there is much that is not 
yet known, and the fight is still being carried 
on. Many men in scientific laboratories in the 
colleges and universities, and in the hospitals 
Do we \now 
all about 
microbes? 
