( 4 1 9 ) 
of any fuch Sight either from home or abroad $ notwith- 
danding that for above half that rime, thefe Philo fphkal 
Tranfatfiom have been a condant Regider of all fuch 
extraordinary Occurrences. The firft yve find on our 
Rooks, was one of fmall Continuance feen in Ireland by 
Mr. Neve on the i 6th of November 1707. of which fee 
Phil. Tranf No. 310. And in the Mifcellanea Berolinenfu 
publifhed in 1710, welearnthat in the fame Year 1767, 
both on the 24 th of January and iSth of February, (l. vet. 
fomething of this kind was feen by M. Olxus Romer at 
Copenhagen: and again on the z$d of February, the fame 
excellent Aflronomer obferved there fuch another Appear- 
ence, but much more confiderable; of which yet he on- 
ly faw the Beginning, Clouds interpofing. But the 
fame was feen that Night by Mr. Gotfried Kirch , at Berlin 
above 200 Miles from Copenhagen, and laded there till pad 
Ten at Night. To thefe add another fmall one of fhort 
Duration, feen near London, a little before Midnight be- 
tween the Ninth and Tenth of Angufl 1708, by the Right 
Reverend Philip Lord Bilhop of Hereford, and by his 
Lordlhip communicated to the Royal Society : fo that, 
it feems, in little more than eighteen Months this fort of 
Light has been feen in the Sky, no lefs than five times; 
in the Years 1707 and 1708. 
Hence we may reafonably conclude that the Air, or 
Earth, or both, are fometimes, though but feldom and 
with great Intervals, difpofed to produce this Bhambrne- 
non : for though it be probable that many times, when it 
happens, it may not be obferved, as falling out in the Day- 
time, or in cloudy Weather, or bright Moondhine ; yet 
that it fhould be Co very often feen at lome times and fo 
feldom at others, is what cannot well be that way accoun- 
ted for. Wherefore cading about and confidering what 
might be mod probably the Material Caufe of thefe Ap- 
pearances ; what fird occurr’d was the Vapour of W ater 
T t t 2 ratified 
