MICBOOBGANISMS AND B.UMAN WELFARE 



33 



lieved to be a sentence to a lingering death; it was believed 

 also that the disease was hereditary. Happily modern 

 medicine has dispelled both these beliefs. A child may 

 inherit weak lungs or a frail body; but it will never be a 



A. Tent open. B. Tent closed. 



Fig. 15. — Window tent. (Courtesy of Dr. Thomas S. Carrington.) 



consumptive unless the bacteria that cause this disease are 

 in some way planted in his tissues. Consumption, too, is a 

 curable disease, unless it is neglected until it has reached 

 an advanced stage. The prime requisites in the treatment of 

 the disease are a plentiful supply of fresh air, plenty of easily 



