147 
mean curve for the three winter months may have the same 
character, if not the same magnitude, during different years. 
The line for August, for example, has shot down far to the 
S.W. which was owing to a few violent thunder storms 
from that direction. The curves for September and October 
have gone more to the west; and it is probable that in 
Spring I shall find the curve extending more to the easterly 
side of the compass, as our then prevailing winds are from 
that quarter. 
‘Another important thing with regard to climate may be 
obtained by using this guage in conjunction with Whewell’s 
anemometer; for by drawing in the same manner and on 
the same paper, the amount of wind from each of the eight 
points for any month, we may see at once the comparative 
dryness or wetness of any wind, (I mean with regard to razn, 
not vapour,) which the mere amount of rain from the dif- 
ferent directions would not give.” 
The following table exhibits the amount of rain during 
the three months above mentioned : 
August. | September.| October. 
—E 
0.342 0.862 0.042 
1.434 1.226 0.836 
0.214 0.954 1.021 
0.052 0.572 0.251 
0.199 0.515 0.148 
0.050 0.248 0.016 
0.026 0.065 0.003 
0.080 0.195 0.019 
2.397 4.637 2.336 
A paper was read “on some Snow Crystals observed on 
the 14th of January, 1838,” by William Thompson and 
Robert Patterson, Esquires. 
The crystals, which form the subject of this paper, were 
observed by the authors among the ordinary snow-flakes, in 
