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<f the hemifphere from the Eaft to the Weft, about 
“ ten o’clock, which lafted about an hour,” the fame 
night, or at lead as fomething fimilar to it. In either 
of which cafes, the atmofphere at London will be 
allowed to have been in a proper diipofition for the 
production of this fpecies of meteors, and impregnated 
with the fame kind of luminous vapour that occalioned 
the phenomenon mentioned here. 
The fingularity of this meteor was fixed by the 
gradual and regular diminution of its refplendency 
between the upper and lower limbs, an inftance of 
which I never obferved before. This continued from 
the time I firft difcovered the arch almoft to the very 
moment of its extinction. The limbs of the zone 
forming this arch were, however, very well defined ; 
infomuch that the regularity of its figure, by the , 
gradual decreafe of brightnefs, was not in the leaft 
impaired. The evening was fomewhat cloudy, but 
ftill and calm, and feveral of the ftars appeared." As 
I have not met with a defcription of fuch a pheno- 
menon, in any of the phyfiological papers confulted 
by me on this occafion ; I have taken the liberty to 
tranfmit you the foregoing account of the meteor feen 
here, on Saturday, October 12, 1766, to be communi- 
cated to the Royal Society, hoping it may prove not 
altogether unacceptable to the members of that 1110ft 
learned and illuftrious body. I am, with great 
regard, 6 
Dear Sir, 
Yourmoft obliged 
humble Servant, 
Chrift-Church, Oxon t 
Nov. 7, j 766. John Svvinton. 
Received 
