78 
EIGHTH REPORT. 
RAINFALL OF THE LAKE COUNTRY FOR THE LAST 25 YEARS. 
MARK S. W. JEFFERSON. 
Fig. 1.—Rainfall of Lake country. 1880-1904. Black areas over 40 inches; lined, over 35; dotted 
over 30 and blank less than 30 inches per year. 
The accompanying chart of mean precipitation about the Great Lakes 
(Fig. 1), is believed to be an advance on its predecessors in two re¬ 
spects, (1) it is based on several more years of observation, and (2) 
all incomplete records are reduced to the full epoch by the proportion 
between the precipitation for the partial and full periods at neighbor¬ 
ing stations. 
