THE LIBRA 
AVERSITY Bwtioey PEN 
NEW SERIES, VOL. XIII, NO. 16. “MARCH, I9T2 
UNIVERSITY OF MICHIGAN 
SUMMER SESSION 
ooo 
ANNOUNCEMENT 
FOR THE 
BIOLOGICAL STATION 
EIGHT WEEKS, JULY 2—AUGUST 28 
FOURTH SEASON, 1912 
Ann Arbor 
PUBLISHED BY THE UNIVERSITY 
IgI2 
