86 DUST AND ITS DANGERS. 



In the ill-cleansed subways of New York 

 fine iron dust from the break shoes is added 

 in large quantities to the common dust of the 

 overcrowded cars. 



Sleeping-cars and the state-rooms of steam- 

 ships and hotel bedrooms are almost always 

 liable to contain infectious material, if they 

 have been recently used by uncleanly consump- 

 tives or those ignorant of the danger of their 

 expectoration. When the infectious nature of 

 consumption becomes more generally appre- 

 ciated, hotels and transportation companies 

 over long routes will be compelled to provide 

 special accommodations for such persons as 

 are known to be thus afflicted. In the mean- 

 time, more careful attention to the cleaning 

 and dusting (that is actual removal of dust) 

 of such places will do much to mitigate the 

 evil. In public buildings with bare floors the 

 use of properly-wetted sawdust, sprinkled over 

 the floors before sweeping, should be more 

 generally followed than it is. 



While the transmission of the tubercle bacil- 

 lus from tuberculous persons to others through 

 dust is of serious import, the risks are greatly 



