C >45 3 



Mr. Ronayne having received the following Letter 

 from Mr. Henly, which corroborates and con- 

 firms the obfervations mentioned in his paper, 

 it was thought proper to print them together 

 in this volume. 



O&ober 16, 17.71, | part 5, P. M. 



I Find a fog (not very thick), foon after its ap- 

 pearance, ftrongly electrical. The balls open 

 I or I inch A, [See Tab. VIII.], and clofe at the 

 approach of excited wax, when brought within 

 10 inches of them B: if the wax is brought within 

 3 or 4 inches, they diverge again, in confequence 

 thereof C : as the wax is withdrawn, they converge 

 again, D, till it gets beyond the diftance of its in- 

 fluence, when they begin to diverge again ; and, as 

 the wax is withdrawn ftill farther, they continue to 

 open, in confequence of the electricity in the fog, 

 till they reach their original diftance from each other 

 E. There is very little difturbance by the wind, 

 and the little there is, only wafts them in a fmall 

 degree, but they keep feparate. If they are held 

 near the tiling, or brick-work, of a neighbouring 

 houfe, they clofe, F ; but begin to diverge again, at 

 the diftance of 3 or 4 feet from it, G j and their di- 

 vergence increases, as they recede from the building ? 

 till they feparate \ or £ inch, as at firft, H. 



Vol. LXII. U Memo- 



