MICHIGAN ACADEMY OF SCIENCE. 
81 
Fig. 2. Rainfall chart with data merely averaged regardless of length of observation series. 
40, 35 and 30 inches per year. 
Fig. 3.—Heavy figures show mean rainfall for 1880-1904, all series reduced to full period, 
numbers give the number of years of observation. 
Shades 
Small 
11 
