247 



like forms which give chipped glass its decorative effect. Evidently there 

 are forces involved here other than cohesion and adhesion, as these terms 

 are commonly used. 



Most of the experimental work of this investigation was done hy Mr. 

 Elmer J. Harrel, now of the high school of St. Paul, Minn. 



Physics Laboratory of Indiana University. 

 Bloomington. Tnd. 



