MINERAL from GREENLAND. 381 



land mineral. But, foon after, I was informed by Dr Wolla- 

 ston, to whom I had fent a fpecimen 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 analylis 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 exiflence 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 poflible attention on my part, 

 and mofl of them were repeated, at lean: a dozen times. I 

 have no doubt myfelf of their accuracy ; but think that the exig- 

 ence of a new metal can hardly be admitted, without flronger 

 proofs than the folitary analyfis which I have performed. 



5. The liquid, thus freed from iron and junonium, was fuper- 

 faturated with pure ammonia. A grey ifh- 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 diflblved, of a fubftance 

 which, feparated in the ufual way, exhibited the properties of 

 alumina. 



6. The remaining 33.9 grains were again diflblved 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 fmall 

 degree of tranfparency. It was taftelefs, felt gritty between 

 the teeth, and was eafily reduced to powder. It efTervefced in 

 fulphuric, nitric, muriatic, and acetic, acids, and a folution of it 



was 



