Dust and Bacteria. 



123 



culosis\ They are alive. Now, so long as they remain 

 on the pavement they do no harm. The sputum dries. 

 But the bacilli are not killed by drying. With other dry 

 material from the pavement they form part of the common 

 dust. Any one of us may breathe Some of this kind of mat- 

 ter any day, for there are persons afflicted with this dreaded 



Bacillus of Diphtheria (x 1000) 



Bacillus of Typhoid Fever 



Bacillus of Tuberculosis (x 1000) 



Bacillus of Typhoid Fever (x 1200) 

 showing flagellums 



Bacillus (Spirillum) of Asiatic Cholera Bacillus of Hog Cholera (x 1000) 



Fig. 63. Different Kinds of Bacilli. 



disease in every community. Our bodies furnish the very 

 best soil for the germs. We do not need to go into the 

 street to be exposed. These germs may be brought into 

 the most cleanly houses upon one's clothing, or by the wind. 



How to avoid the Danger. Of course, all such material 

 known to be dangerous should be destroyed. If those 

 suffering from such diseases were careful to burn all such 

 matter, in time we might stamp out the diseases. But so 



