14 Bulletin Wisconsin Natural History Society [Vol. 12, Nos. 1 & 2 
ate moist summers. Exact figures for the annual precipitation 
are not available, but it is approximately thirty-two inches, the 
majority of which falls during the months of May, June, July, 
August and September; the precipitation for any one of the sum- 
mer months, June, July, or August, usually equals or exceeds that 
of all the winter months, December, January and February. The 
daily range of temperature is greatest during the summer months, 
when the nights are always cool and when midday may reach an 
almost torrid heat, a temperature of 103°F. having been recorded. 
The following table shows the mean temperature by months, the 
highest and lowest recorded temperatures by months, and the 
mean annual temperature in degrees Fahrenheit as computed for 
Rhinelander, Wisconsin: 
1 
J.\N. 
FEB. 
MAR. 
APR. 
M.XY 
JUNE 
JULY 
Mean 
1 11.5 
13.8 
25.1 
41.0 
52.6 
62.7 
66.2 
High 
[ 53.5 
• 53.5 
73.0 
82.0 
94.0 
103.0 
97.5 
Low 
-38.5 
-37.5 
-24.5 
-3.0 
12.5 
24.0 
31.5 
AUG. 
1 SEPT.- 
OCT. 
NOV. 
DEC. 
ann’l 
IMean 
64.1 
57.3 
44.7 
30.3 
16.1 
40.4 
High 
95.5 
94.0 
83.5 
72.0 
57.0 
103.0 
Low 
28.5 
20.0 
6.5 
-12.5 
-30.0 
-38.5 
III. THE RIDGEWAY BOG 
A . Description of the Bog 
Ridgeway Bog proper covers an area, somewhat irregularly 
oval in shape, of about two hundred and twenty acres. The long 
axis of this area lies in a north and south direction, and is over 
three-fourths of a mile in length; the short diameter is about 
two-thirds of a mile long. The elevation is fifteen hundred and 
thirty feet above sea level. The south, east, and north shores 
of the bog are met by a gradual slope; the west slope of the basin is 
abrupt with an inclination in most places of 30° to 40°. This hill. 
east and west of the locality under consideration. While it may be justly objected that this does 
not indicate the exact conditions under which the biota lives, yet it gives a general idea of the 
climate. 
