BULLETIN 
OF THE 
SCIENTIFIC LABORATORIES 
OF 
DENISON UNIVERSITY, 
EDITED BY 
C. L. HERRICK, Dep’t. of Geol. and Nat. History, 
AND 
A. D. COLE, Dep’t. of Chemistry and Physics. 
VOL. II, PART 2. 
GRANVILLE, OHIO, APRIL, 1887. 
