38 GENERAL SCIENCE 



three injections are given ten days apart, and as a rule no 

 interference with one's daily duties is experienced from the 

 vaccination. Cases of typhoid are already rare occurrences 

 in military camps because of enforced vaccination, and a 

 strict observance of sanitary regulations. Discharges from 

 the bowels and kidneys of typhoid patients should always 

 be treated with a strong solution of "chloride of lime" for 

 twenty minutes or more to destroy the germs before being 

 thrown into cesspool or sewer. The danger of spreading 

 the disease is thus greatly lessened. 



An understanding of the nature of many of the most 

 terrible germ diseases that afflict humanity is one of the 

 notable achievements of the years just at the close of the 

 nineteenth century and at the beginning of the twentieth. 

 There is reason to believe that the time may come when 

 their ravages will cease to be the scourge of humanity. 

 Preventive measures combined with medical skill and 

 enforced sanitation have already accomplished much toward 

 this end. 



Malaria, the sleeping sickness of Africa, and splenic 

 fever in cattle are due to protozoa. The list attributed to 

 bacteria includes typhoid, tuberculosis, pneumonia, tetanus 

 (lockjaw), meningitis, influenza (grippe), diphtheria, leprosy, 

 cholera, and bubonic plague. Measles, hydrophobia, 

 scarlet fever, small pox, whooping-cough, and yellow fever 

 are other infectious diseases not so positively classified. 

 To this list may doubtless be added the dread diseases of 

 cancer and infantile paralysis. 



Many of the so-called " children's diseases," such as 

 measles, scarlet fever, and whooping-cough, are not only 

 to be avoided but should be regarded as highly dangerous. 

 This is chiefly on account of possible complications with 

 other diseases, and because of a train of serious lifelong 

 ailments that follow them, such as weakened eyes, affected 



