m- 
DENISON UNIVERSITY 
BULLETIN 
Volume XXIII, No. 4 
Journal 
OF THE 
Scientific Laboratories 
Volume XX 
Articles 4-8 
Pages 37 to 185 
4. Notes on Medinan, Niagaran, and Chester Fossils. By Aug. F. 
Foerste 37 
5. The Egg and Larva of Hesperia juba Bdv. By A. W. Lindsey. . . . 121 
6. The Occultation of Venus by the Moon on January 13, 1923. By 
P. Biefeld 127 
7. A Botanical Survey of the Campus of Denison University. By 
Dwight Munson Moore 131 
8. The Underground Migration of Oil and Gas. By Kirtley F. Mather 155 
GRANVILLE, OHIO 
JUNE, 1923 
The University Bulletin is issued bi-monthly and is entered at the 
Post Office in Granville, Ohio, as mail matter of the Second Class 
