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In the year T750 they had an earthquake here, 
which lafted for three months, with almoft conti- 
nual tremblings, which at laft broke out in an erup- 
tion, in a fmaliifland in the middle of a large lake, all 
round which, the bottom is unfathomable. The third 
day after the commencing of the eruption, there arofe 
four more fmali illands in the lake, all burning: ; 
and about a mile difLnce from one there is a con- 
tinual fire, which comes out of the water, where 
there is no ground, for upwards of an hundred fa- 
thoms deep. This I faw myfelf, and went very near it. 
I will get a draught of it and fend it you. This 
happened but four years ago, and if you were to feel 
fome of thefe fhoc cs, you would think they were 
capable of producing any thing, for they are very- 
terrible indeed. 
LXIV. An EJfay on the Waters of the Holy 
Well at Malvern, Worcefterfhire. By 
J. Wall, M. D. Communicated by the 
Rev. Charles Lyttleton, L. L. D. Dean 
of Exeter. 
Reverend Sir, 
Read Feb. 5; S you are pleafed to defire fome 
17 * 6 ' JLJL account of my obfervations on the 
Malvern- Waters, I have here tranfmitted them. 
That I did not do this fooner, you will, I hope, im- 
pute to the true caufe, the multiplicity of my avo- 
cations. I would gladly have repeated the experi- 
ments. 
