{ lop? ) 
IV. An Account of the Phaenomena of a very 
extraordinary Aurora Borealis, feen at London 
on November lo. 1719* hoth Morning and 
Evening, Dr. Edmond Halley. R.S.Secr, 
U PON Tuefdaj^ November 10. 1719. in the Morn- 
ing, Jnpiter applying to the Second in the Wing 
of N/rgo, I got up about $ of the Clock to obferve him, 
and having had the Satisfadion to fee my Calculus per- 
fedly well anl’wer the Heavens, I found certain white 
Streaks in the Sky, feeming nearly Perpendicular ; which 
whilft I confidered them feemed inftantly to vanifli, and 
foon after others came as inftantaneoufly in their room, f 
began to imagine that this was likely to be (bme part of 
the Phenomena of the Aurora Borealis. But there appearing 
nothing like that luminous Arch which we haveof late fo 
often feen in the Norths knew not what to think; till look- 
ing up towards the Zemth, 1 perceived an entire Canopy 
ot (uch kind of white Stride, feeming to defcend from a 
white Circle ol faint Clouds, about 7 or 8 degrees in 
Diameter, which Circle fometimes would vanilh on a 
fudden, and as fuddenly be renewed. I obferved that 
the Center of th s place of Concourie was not precifely 
in the Zenith, but rather 14 degrees to the Southwards 
thereof ; which I was well enabled to eftimate by a Star, 
which on each return thereof fliewed its felf about the 
Center of the Circle. This Star is the iph Star of the 
Great Bear in r-yf^o’s Catalogue, whole diftance from the 
Pole at this time is 5i Ydegrees, and which about half an 
hour paft Five that Morning pad the Meridian, fo that 
thofe Rays centred very nearly on the Meridian it felf It 
i o G was 
