( 160 ) 
that we might pronounce concerning its Height with more 
certainty : Yet, as it is^we may fecurely conclude, that it was 
not many Miles more Wefterly than Redgrave, which, as I 
faid before, is above 40 Miles more Eafterly than London. 
Suppofeic therefore, where perpendicular, to have been 35- 
Miles Eaft from London , and by the Altitude it appear’d at in 
London , viz. 50 Degrees, its Tangent will be 41 Miles, for 
the Height of the Meteor above the Surface of the Earth; 
which alto is rather of the leaft, becaufe the Altitude of the 
Place (hewn me, is rather more than lefs than jo Degrees : 
and the like may be concluded from the Altitude it appear’d 
in at Redgrave , near 70 Miles diftant. Though at this great 
Diftance, it appear’d to move with an incredible Velocity, 
darting, in a very few Seconds of Time, for about 1 2 Degrees 
of a great Circle from North to South, being very bright at 
its firft Appearance j and it died away at the End of itsCourfe, 
leaving for (ome time a pale Whitenefs in the Place, with 
fome Remains of it in the Track where it had gone ; but no 
hiding Sound as it pad, or Bounce of an Explofion were heard. 
It may deferve the Honourable Society’s Thoughts, 
how fo great a Quantity of Vapour (hould be railed to the 
very Top of the Atmofphere, and there colle#ed, fo as up- 
on its Accenfion or other wile Illumination, to give a Light 
to a Circle of above 100 Miles Diameter, not much inferior 
to the Light of the Moon ; (b as one might fee to take a Pin 
from the Ground in the otherwife dark Night. *Tis hard to 
conceive what fort of Exhalations (hould rife from the Earth, 
cither by the A#ion of the Sun or fubterranean Heat, fo as to* 
furmount the extream Cold and Rarenefs of the Air in thofe 
upper Regions : But the Fa# is indifputable, and therefore 
requires a Solution. 
Like to this, but much more confiderable, was that famous 
Meteor which was feen to pafs over Italy on the x\Jl of 
March 0 . S. Anno 1676. about an Hour and Three Quarters 
after Sun fet, which happen’d to be obferved and well confi- 
der’d by the famous Profeflor of Mathematicks in Bononia 
% Gemini 
