the Native Gold discovered in Ireland. 
45 
that its weight was 20 0%. 2dzvt. 21 gr. and its specific gra- 
vity, to that of sterling gold, as 12 to 18. Also that Richard 
Kirwan, Esq. F. R. S. found the specific gravity of another 
specimen to be as 13 to 18. Hence, as the gold was worth 
JT 4 an ounce, Mr. William Molesworth concludes, that 
the specimens are full of pores and cavities, which increase 
their bulk, and that there are some extraneous substances, 
such as dirt or clay, contained in those cavities. 
This opinion was discovered to be well founded, by cutting 
through some of the small lumps. 
Stanesby Alchorne, Esq. his Majesty's Assay-master at 
the Tower of London, assayed two specimens of this native 
gold. The first appeared to contain, in 24 carats, 
2 if of fine gold ; 
if of fine silver ; 
f of alloy, which seemed to be copper tinged with a little 
iron. 
The second specimen differed only in holding 2 if instead 
of 2 if of fine gold. 
Major John Brown, of the royal engineers, transmitted 
to the Right Hon. Thomas Pelham a sketch of the spot 
where the gold was found, which Mr. Pelham has obligingly 
permitted to be engraved, for the use of the Royal Society. 
See Tab. II. 
C. R, 
