PLATE IX. 

 FIG. i. Bacterium prodigiosum 



Monas prodigiosa. 



Micrococcus prodigiosus. 



Bacillus prodigiosus. 



Blood rain. 



Growth on potato after three days. 



FIG. 2. Penicillium glaucum. 



A potato which had been freely exposed to the air was 

 covered in three weeks by a growth of Penicillium 

 glaucum. The surface of the growth is studded 

 with dew-like drops of moisture. 



