BULLETIN 
OF THE 
SCIENTIFIC Laboratories 
OF 
DENISON UNIVERSITY 
EDITED BY 
FRANK CARNEY 
Permanent Secretary Denison Scientific Association 
This volume is published in commemoration of the twenty-fifth anniversary 
of the election of Clarence Luther Herrick to the Professorship of 
Geology and Natural History at Denison University 
VOL. XV 
GRANVILLE, OHIO, 1910 
