,$7 S Mr. Hatchett's Analysis of 
£The water, and other substances described in the foregoing 
letter, were delivered to Mr. Hatchett, who had been 
previously requested, by the President and Council, to exa- 
mine them. The result of his examination is related in 
the following letter to the President.]] 
Analysis of the Water of the Mere of Diss. By Charles 
Hatchett, Esq. 
DEAR SIR, Hammersmith, Sept. 14th, 1798. 
In consequence of the request which you and the Council of 
the Royal Society have done me the honour to make, that I 
would examine the water of Diss Mere, and the other substances 
sent by Mr. Wiseman, I now hasten to acquaint you with the 
result of my experiments. 
The substances sent by Mr. Wiseman are as follows : 
1 Some copper wire, with a blackish grey incrustation. 
Water from Diss Mere, (marked No. 1.) 
Copper cuttings, covered with a blackish crust, similar to 
that on the copper wire, (marked No. 2.) 
Some cuttings similar to those abovementloned, (marked 
No. 3.) 
The paper. No. 4. contained some of the black crust, de- 
tached from the cuttings. 
No. 5. A quart bottle, containing some water from the 
lower part of the town of Diss, and called, by Mr. Wiseman, 
a chalybeate water. 
No. 6 . Some flints, taken from the SE side of the Mere, 
where the water is shallow, and having (as Mr. Wiseman 
terms it) a metallic stain. 
