C 188 ] 
Sect. XVIII. 
Fig. 8. The two Defences of the Tail, of which 
the exterior Part A. is gibbous, the other 
or interior B. is, as it were, hollowed : 
Thefe Extremities are bifid. C. By this 
Part they are joined to the Tail. 
yi. Ohfermtions of Explofions in the 
Air 5 one heard at Halfted m Effex, hy the 
Rev. Mr. A. Vievar, Minifler of that ^laee^ 
the other hy Sam. Shepheard, Efq^ Spring- 
field in the fame County, 
O N Sunday the i2th oi March 173 1-2. between 
One and Two o’clock in the Afternoon, 
walking in my Garden by the Side of a Canal, I 
heard as it had been a large Clap of Thunder from 
jhe North-Eaft, being a very clear Day, and no 
Clouds appearing. While J was looking into the 
Air, the Noife was repeated very loud, but feemed - 
more like tlie violent Fall of a Houfe, infomuch that 
I expefted every Moment an Out-cry from the Town : 
But I was foon undeceived, when it began again, 
and I found it made towards me, with a different 
Noife from what I had heard, that is, like the Grind- 
ing of Flint-ftones, but’ very loud : The Dimenfions 
of it feem’d to be about three Foot wide. I found 
it fink in the Air, and as it feem’d to point diredly 
at my Head, I laid myfelf down upon a Grafs-flope, 
to let it pafs over me. However, at the upper End 
of 
