r r 32 ] 
A further Note from the fame Gentleman. 
In Auguft laft, Mr. winn fent Dr. franklin 
fome obfervations on the Aurora Borealis , to which 
he would add, that, on Saturday evening, the 16th 
inftant, as Mr. Winn came to town, the Aurora 
was fo bright, that he found a croud of people in 
the Minories, gazing at it, which they took to be 
the effect of a great fire about Bifhopfgate-ftreet; 
the next day we had a hard gale at S. S. W. with 
•rain. 
Friday Morn. 22 Jan. 
Conjecture on the foregoing. 
The Aurora Boreales , though vifible alrnofb 
every night of clear weather, in the more northern 
regions, and very high in the atmofphere, can 
fcarce be vifible in England,. but when the atmo- 
fphere is pretty clear of clouds, for the whole fpace 
between us and thofe regions, and therefore are 
feldom vifible here. This extenfive clearnefs may 
have been produced by a long continuance of s 
northerly winds. When the winds have long 
continued in one quarter, the return is often vio- 
lent. Allowing the faft fo repeatedly obferved by 
Mr. Winn, perhaps this may account for the 
violence of the foutherly winds, that foon follow 
the appearance of the Aurora . on our coafls. 
B. F. 
XVIII. Exr 
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