Smithsonian Report, 1895. 



Plate XXII. 



N._12<t 



N.W-108 



W_77 



N.Z-152 



EJ30 



S.W_58 



S_*2 



41. —Influence of the direction of the wind on the number of microbes collected 

 at Montsouris. (Miquel.) 



The Air of Towns. 



