898 Prof. Harrar’s abstract of meteorological observations. 
Tue table on the preceding page is intended to show the influence which the 
winds, blowing from different points of the compass, have upon our climate. 
The several-numbers are the means of a large number of observations, continu- 3 
ed for twenty years. The observations are taken for fair weather and foul, for 
morning, noon and night, during the winter and summer months ; and they are 
so selected and detached from all other circumstances affecting the thermome- — 
_ ter, as to exhibit as fairly as possible the simple effect of the direction of the 
' wind upon the temperature of the air. The first part of the table is made from ‘ 
observations taken with an internal thermometer ; the second from observa 
tions with a thermometer exposed to the external air. Below the observations _ 
for the months in each part of the table, are subjoined the means of the summer 45 
it 
a Sa. Mee 
and winter observations, for morning, noon, and night, and the mean of these a 
means. It will be observed that there are. several blank places in this ta- = 
ble, there being no thermometrical observations corresponding to the state of Z fe 
the wind and weather, to which they belong. Also sume of the numbers in the 
columns N E and E are single observations, instead of being the means of sev 
eral, the wind being very rarcly at either of these points in fair yout in 
_ the winter months. 
Tt ought to have been mentioned, that the aceatiiy mean state ob the ethers 
mometer, according to the observations of Dr. Winthrop, given page 389, Was, ; ; 
the result of only two observations each day, namely, at 7 o’clock A. M. and at: Bia 
P.M. The mean of the morning observations for fifteen years, beginning vith = 
1743, is 46:42° ; thé mean of the morning observations for the winter mouths 
only 28°10°. Mean temperature at the same hour, according to the ong 
tables, 44°22° for the year, 23°7° for the winter months. 
4 3 
