147 



mean curve for the three winter months may have the same 

 character, if not the same magnitude, during different years. 

 The Hne 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 chmate 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 rairiy 

 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 : 



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 



