C n i ] 
as with a Spring, and drop’d again. Many People 
felt it there in various Shapes. At Cajlor, a Mile 
and Half ftili farther Weft, one Mr. Serjeant fays, 
that, looking out of a Window a conftdcrable Height, 
he found the Houfe reel more than once, and then 
come into its Place again with a Jolt. Many very 
odd Inftances we have of it. Some heard the Node, 
and felt not the Shock; others felt it, and did not 
hear the Noife. I am informed it was felt at Bojlon , 
which lies about 30 Miles near North of us; and it 
was felt a few M:lcs to the South : So that its Extent 
here, from N W. to SE. or thereabouts, fee ms to 
be about 40 Miles. Upon the Whole, I find, the 
higher one was, as farther from the Centre, the more 
the Shock was felt; that it was local; tire Sound of 
the Explofion was heard as well abroad as in the 
Houles, tho’ People differently fituated judged dif- v 
ferently what the Sound was ; that not any Smoke, 
Vapour, or Flame, appeared on the Surface, as I 
have heard. I am 
Tour tnoft obedient Servant, 
W m . Smith. 
Lvir. 
Tloe Philofophy of Earthquakes ; by the Rev. 
William Stukeley, M.D. F R.S. &c. in 
a Tetter to Martin Folkes, Efq\ LL. D. 
and Prefident of the Royal Society, c Wc. 
Ktad Dec. 6. M I N C E I had the Honour to lay be- 
17 s °' fore the Society, in the Spring, my 
Thoughts upon Earthquakes, we have had many 
y A 2 Oppor- 
