CHAPTER X. 



DUST-DANGERS IN PUBLIC BUILDINGS AND PUBLIC 

 CONVEYANCES. 



WE come now to another class of places 

 in which dust is a matter for very seri- 

 ous consideration. I mean theatres, churches, 

 schools, and court-rooms and other places of 

 assembly in-doors where large numbers of per- 

 sons are frequently crowded together. Here 

 the individual in the matter of the cleanliness 

 of the air he breathes is largely at the mercy 

 of his fellows, and especially of the persons 

 too often ignorant and careless to whom is 

 intrusted the more or less frequent sweeping, 

 dusting, or other cleaning of the rooms. 



So prevalent is consumption, and so insidi- 

 ous in its onset that there are very few large 

 assemblages in which some victims of the dis- 

 ease are not present. Such persons, if not 



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