Proceedings of the American Academy of Arts and Sciences. 



Vol. XLVI. No. 2. — September, 1910. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF 

 THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 

 COLLEGE, E. L. MARK, DIRECTOR. — No. 211. 



THE REACTIONS OF EARTHWORMS TO ACIDS 



By S. H. Hubwitz. 



