V. 



MISCELLANEOUS PAPERS. 



"On the Immunity of the Kansas Bottom Ground Waters to 

 Changes in the Composition of the Kansas River Water." 



By Prof. C. C. Young. 



"The Common Mole— Runway Studies." 



By Theo. H. Scheffer, U. S. Biological Survey. 



"The Longevity of Yale Graduates." 



By J. T. Lovewell. 



"Has the Quality of Drugs Improved Since the Enactment op 

 the Food and Drugs Law?" 



By M. N. Wedel and L. D. Havenhill. 



"A Further Discussion of Municipal Ownership of Water and 

 Light Plants." 



By J. A. G. Shirk. 

 (151) 



