130 MINUTES OF SECTION A. 



bottles showing the decolorization of the solution by the 

 action of anaerobic bacteria when the bottles were corked and 

 the recovering of color by oxidation when the bottles were 

 uncorked. Benjamin F. Fields presented a large specimen of 

 yellow fungus found near the Media water works. This was 

 identified as Polyporus sulphureus. Dr. Underhill gave an 

 interesting talk on the geological history of animals, calling 

 attention to the course of evolution through successive ages 

 with the accompanying rise and fall of animal species. 

 Adjourned. 



