FRUITING OF MOLDS 



23 



Plate I 



Plate II 



Fig. 18. Plates exposed to the air before and after 

 sweeping, showing the abundance of mold spores 

 in the air. The upper plate was exposed before 

 sweeping, and contains one mold ; the lower after 

 sweeping, and contains numerous molds. Each 

 was exposed for one minute. 



