Smithsonian Report, 1895. 



Plate XIX. 



35.— Atmospheric microbes. 



a, algae; 6, cells of cryptogams; c, spores of cryptogams. X500. (Miquel.) 



1000 B 





36. —Atmospheric microbes. 



a b, vibrios; c d, bacteria; /<7 h, micrococci; i, torulae. X1000. (Miquel,) 



The Air of Towns. 



