GOOD HEALTH 



of course, it is not good for any pair of lungs to inhale 

 such air as that. We must remember that dust is just as 

 thick everywhere else in the room as it is in the sunshine. 



After all, however, the worst thing 

 about dust is the microbes that are 

 in it ; and it is easy to see that they 

 are always thickest where the dust 

 is thickest, for instance, in the streets 

 of a city. People who know this are 

 the ones who take the greatest pains 

 to keep dust and microbes out of 

 their lungs and out of their homes. 

 They know that any wind 

 strong enough to whirl the 

 least dust along is quite strong 

 enough to carry whole armies of 

 microbes from one place to another. 

 These microbes get into the air 

 from the skins of 

 people who have 

 skin diseases; they 

 are blown by mil- 

 lions from every 

 heap of dry rubbish 

 that you see, from garbage cans and sewers, from dead 

 animals and soiled clothes. In fact, they multiply fastest 

 in unclean places. 



STIRRING UP DUST AND MICROBES 



