C 8 ?7 3 
raifed, than by the Mixture of tjhofe Liquors with Rain- 
water. 
7. Six Quarts of this Water, being boiled to a Pint, 
let fall a large Quantity of a fine, whitifh, inlipid 
Powder; and the Water fo boiled had a very ftrong 
faline Tafte, with a Mixture of Bitternefs, not unlike 
the Sal cartharticnm amarum , 
8. It let fall a copious white Sediment, on the Ad- 
dition of the Oil of Tartar, which has the fame EfFed 
on a Solution of Alum, or of Sal catharticum ama- 
rum. 
9. Xhe boiled Water, after it had depolited its 
Earth, precipitated large white Flakes, on the Addition 
of Oil of Tartar. 
10. It differs from a Solution of common Salt. 
For the Oil of Tartar, being dropped into that 
Solution, caufed only a flight Precipitation, which was 
foon afterwards abfoibed again by the Water. 
11. It does not lather with Soap. 
Having made thefe Experiments, I was fatisfied, 
that this new Spring was really a Purging Water, as 
it has lince been found by Experience. Some of Mr. 
Cox’s Family drank of it with Succefs, which en- 
couraged feveral other Perfons to try it, to their great 
Advantage. 
Being drank frefh, in the Quantity of Five half pint 
Glaffes, it purges quickly, not finking, but railing the 
Spirits. 
It is found to be very diuretic. 
T hefe Properties of the Dulwich Water do not 
feem to be owing to any of the Materials found in 
digging the Well. The Pyrites are known to be a 
Mixture of Iron and Sulphur; but this Water feems 
5 Q, z to 
