OBSERVATIONS. 81' 



Mean Monthly Point of Deposition, 



Jttly. Aug. 8«pt. Oct. Nov. Dec. 



53«.0 530.6 510.3 45M 41».0 36o.O 



M'umber of Tliunder Storms observed, 

 26 27 8 6 5 3 



On the evening of the 10th of June, 1822, 

 this neighbourhood was visited by one of the 

 most remarkable thunder storms I remember to 

 have seen : numerous and vivid electrical dis- 

 charges, from almost every point of the compass, 

 illuminated the sky; indeed, for the space of 

 more than an hour, there were, on an average, 

 sixteen distinct flashes of lightning in a minute. 

 The point of deposition, at the time, was 57**.5, 

 and, on the evening of the preceding day, it 

 was 6 P. When the dew-point is unusually high 

 for the season of the year, but more especially 

 in summer, thunder frequently ensues on the 

 same or following day. 



Of eighteen appearances of the aurora borealis, 

 which have been registered from 1821 to 1828, 

 inclusive, one occurred in 1821, one in 1826, 

 seven in 1827, and nine in 1828; it is evident, 

 therefore, that this interesting phenomenon has 

 been visible much more frequently, in England, 

 during the last two years of the series, than for 

 a considerable period antecedent to them. On 



