110 MICRO-ORGANISMS IN RELATION TO MAN. 
he was investigating. Only a few weeks ago, a physician, 
investigating the organism of diphtheria, contracted this 
deadliest of all diseases, and fell a victim to the cause of 
Science. 
It is impossible to avoid the conviction that those who, 
for the good of mankind, undertake the investigation of these 
malignant foes, display a quiet heroism, which is equal to 
that of the sailor who prefers to perish with his ship, or the 
soldier who leads a forlorn hope. 
DDD 
