ie a Sir Ke i. Pcr’s Deferiptions of the 
freth-water being to ‘the ‘depth of twelve feet'in the fand, and 
in the fame line, a few” feet’ deeper, the’ water fhould be én= 
tirely falt, and that’ they do not mix together. Whether thé 
greater fpécific g gravity of ‘the falt-water is fufficient to prevent. 
a mixture with the ftefh upon a higher line, I cannot venturé 
to fay; but the fact of there being a feparation is beyond a: 
doubt, and ‘the depths thay be afcertained to a degree: of 
great accuracy. However this may be accounted for, the 
difcovery at Landguard Fort is of Very great confequence to 
the garrifon ; and ‘there is’ reafon to think, that in fimilar 
fituations, where water ‘is wanted, an attention to — has 
been already exphatiert nes be found as tHE, © | 

Van) 
King’ s Wells at Harwich. 
‘They were ‘bogie the 6th a May, £781, upon, General 
RaAINsForD’s taking the command at that Slate and fnithed 
the 29th of September following. 
The wells in this neighbourhood, as has already been she 
ferved, being very fhallaw, and only depending on {prings 
from the upper furfaces of the ground, have but little! water.in 
the fummer, ard the quality of it is very bad. The beft of 
the old wells was in the rear of General RAINSFORD’s camp, 
and was thought of at firft for the ufe of the troops; but he 
prudently declined that fupply. It was:imagined, as the water 
from. the upper furface was of a bad quality, that the moft 
likely way to ‘obtain a better {pring was to fink a well from 
higher ground, and to endeavour to penetrate through a,rock 
which lay a few yards under the level of the country, although 
the operation might be tedious, upon the chance of cutting a 
fpring 
