268 ABSTRACTS OF THE MAKERSTOUN OBSERVATIONS, 1843. 
TABLE VII—Daily, Weekly, and Monthly Means of the Temperature of Evaporation, as deduced» 
from the Nine Daily Readings of the Wet Bulb Thermometer in 1843. 
March. | April. May. . July. . Sept. 
° ° 
43-9 . 53-2 
3 | [53-0] 
55-6 
52-5 
57-7 
54-4 
53-6 
53-7 
[53-8] 
54:3 
52:3 
54-6 
56-1 
54-2 
55-5 
[54-0] 
54-3 
54:3 
49-9 
49-5 
50-7 
53-3 
[52-5] 
49-3 
53-0 
59-4 
52-5 
The daily means have been obtained from the daily observations by the formule already given, Table L., 
for the dry bulb thermometer. 
Annual Variation of the Temperature of Evaporation. —This follows the same law as the temperature of 
the air, Table I, The greatest monthly mean is that for August, the least is that for February. 
The means for the ‘meteorological seasons are as follow :— 
Winter, Dec., Jan., Feb., 37°2 Jan., Feb., Mar., 35°:1 
Spring, Mar., Apr., May, 41°-0 Apr., May, June, 44°38 
Summer, June, July, Aug., 52°°3 July, Aug., Sept., 53°5 
Autumn,  Sept., Oct., Nov., 43°7 Oct., Nov., Dec., 40°7 
The year 1843, 43°-54. 
