‘MINERAL from GREENLAND. 38 
Jand mineral. But, foon after, I was informed by Dr Wotia- 
ston, to whom I had fent a {pecimen of the mineral, that he 
had not been able to obtain any of my fuppofed Junonium in. 
his trials. This induced me to repeat the analyfis no lefs than 
three times, and in neither cafe was I able to procure any more 
of the fubftance which I have defcribed above. Thus, it has 
been out of my power, to verify the preceding details, and to 
* put the exiftence of a new metal in the mineral beyond doubt. 
At the fame time, I may be allowed to fay, that the above ex- 
periments were made with every poffible attention on my part, 
and moft of them were repeated, at leaft a dozen times. I 
have no doubt my(felf of their accuracy ; but think that the exift- 
ence of a new metal can hardly be admitted, without ftronger 
proofs than the folitary analyfis which I have performed. 
5. Tue liquid, thus freed from iron and junonium, was fuper- 
faturated with pure ammonia. A greyifh-white gelatinous mat- 
ter precipitated. It was feparated by the filtre, and became 
gradually darker coloured when drying. This matter, after 
being expofed to a red heat, weighed about 38 grains. When 
boiled in potafh-ley, 4.1 grains were diflolved, of a fubftance 
which, feparated in the ufual way, exhibited the properties of 
alumina. 
6. THE remaining 33.9 graims were again diffolved in mu- 
riatic acid, and precipitated by pure ammonia. The precipi- 
tate was feparated by the filtre, and allowed to dry fpontane- 
- oufly in the open air. It aflumed an appearance very much 
refembling gum-arabic, being femi-tranfparent, and of a brown 
colour. When dried upon the fand-bath, it became very dark- 
brown, broke with a vitreous fracture, and ftill retained a {mall 
degree of tranfparency. It was taftelefs, felt gritty between 
the teeth, and was eafily reduced to powder. It effervefced in 
fulphuric, nitric, muriatic, and acetig‘acids, and a folution of it 
was 
