MADE AT THE APARTMENTS OF THE ROYAL SOCIETY. 
229 
Table deduced from the preceding, showing the variations of the Barometer 
reduced to 32° Fahr. 
Direction 
of the 
Wind. 
No. of 
Obser- 
vations. 
9 A.M. 
S P.M. 
N 
117 
+ .114 
+ .140 
NNE 
88 
+ .158 
+ .155 
NE 
35 
+ .021 
+ .032 
ENE 
16 
+ .100 
+ .056 
E 
74 
— .002 
-.005 
ESE 
68 
+ .038 
+ .029 
SE 
30 
— .128 
-.128 
SSE 
39 
-.178 
— 218 
S 
73 
—.107 
—098 
SSW 
88 
-.106 
-.113 
sw 
103 
— 034 
— .056 
wsw 
143 
— 015 
+ .003 
w 
83 
+ .023 
+ .036 
WNVV 
18 
— .032 
+ .013 
NW 
65 
+ .013 
—093 
NNVV 
56 
+ .018 
+ .118 
Mean .... 
29.863 
29-835 
I shall not attempt to enter into any discussion of the influence of electrical 
phenomena upon the weather ; no observations with reference to this part of 
the subject have yet been made here. 
I have to acknowledge the very kind assistance of Mr. Deacon, (to whom I 
have been indebted before,) in forming the Tables which accompany this paper. 
I have not discussed the circumstances under which the observations have 
been made which serve for the foundation of the results which are here pre- 
sented, although I fear that the instruments employed are unworthy of the 
Society and of the care bestowed upon the observations by Mr. Hudson. This 
discussion would have been necessary if my object had been to determine the 
mean temperature or the mean barometrical pressure at London ; but as I have 
only endeavoured to ascertain the fluctuations of the barometer due to certain 
causes, whose periods are independent of any errors that may arise from the 
construction and condition of the instruments, those errors are of little im- 
portance in the preceding investigation. 
