January, 1950                        CHICAGO NATURAL HISTORY MUSEUM BULLETIN
                                                Page 3 
NATURALISTS' CALE 
By KARL P. SCHMIDT 
CHIEF CURATOR, DEPARTMENT OF ZOOLOGY 
T IS at the simplest observational level 
in natural history that one begins to 
keep a record of seasonal events-seasonable 
and   unseasonable  temperatures; winter 
visitants to one's bird shelf; the arrival of 
the first robin and then the stream of 
transient bird migrants; the blooming of 
the earliest flowers and of those that come