[ 579 ] 
when expofed to the air, and is liquid and clear as 
water under-ground. 
I have gone up this mountain feveral times to ga- 
ther dimples ; but as the plants it produces, have al- 
ready been defcribed by the Rev. Fathers Plumier 
and Feuillee, the two minims, who went for that 
purpofe upon the mountain called Pelee, in the ifland 
of Martinico, which is likewife a volcano, and pro- 
duces the fame plants as the Brimftone-hill of Gua- 
delupa ; I Shall forbear giving an account of my en- 
quiries in this particular. 
LXXXVI. Account of the Earthquake , felt 
February 18, along the Coafl of England, 
between Margate and Dover, in a Letter 
fro?n Mr. Samuel Warren, Supervifor of 
Excife , to John Windham Bowyer, Efq\ 
one of his Majejly s Commiffi oners of Ex- 
cife. Communicated by John Pringle, 
M. D. F.R.S. 
Honourable Sir, 
Read April i, V^Urfuant to an order from Mr. No- 
I75 ^ JL hie, bearing date the nth inftant, 
I have made inquiry, as therein directed, relating to a 
fhock of an earthquake, which happened on Wed- 
nesday the iSth of February laid ; and find, that at 
Margate it was felt by Mr. Valentine Jewel and his 
family juft before eight o’clock in the morning: they 
being 
