NEW METAL, COLUMBIUM. 33 



5. During the fufion, carbonic acid is expelled, and the The potato 

 pot afh becomes partially neutralized by a metallic acid, which acid . prec ; p ;.! 

 may be feparated after folution in water, by nitric acid added table by nitric 

 to excefs, and then appears in the form of a copious white * 

 flocculent precipitate. 



6. The ore confifts of more than three fourths of this fub- This acid* very 

 fiance combined with iron. abundant 



7. The white precipitate is infoluble in boiling nitric acid, Infoluble in ni- 

 and remains perfectly white. tnCi 



8. Boiling muriatic acid diiTolves it when recently fepa- But foluble in 

 ra^d from pot afh. muriatic 5 



9. Sulphuric acid when ftrongly heated alfo diflblves it. And fulphuric 



10. The acid folutions when faturated by alkalis afford 3cJ(1, 

 white flocculent precipitates ; pruffiate of pot afh forms an Preclpitable, 

 olive green ditto ; tincture of galls, deep orange coloured 



ditto ; water alfo when copioufly added to the fulphuric folu- 

 tion precipitates this fubftance in the ftate of fuiphate, which 

 as it becomes dry, from white, changes to blue, and laftly to 

 grey. 



1 1 . Zinc forms a white precipitate. 



1 2. The white precipitate combines with pot afh and foda, Neutral falts and 

 both by the dry and humid ways ; it expels carbonic acid, and tlieir affe&ions- 

 with pot afh forms a glittering fcaly fait, which has much the 

 appearance of the boracic acid. 



13. Acids feparate it from the fixed aljcalis, and when added 

 to excefs do not diffolve it unlefs heated, but even then nitric 

 acid has no effect. 



14. The fame is obferved when alkalis are added in excefs 

 to the acid folutions, 



15. Hydro-fulphuret of ammoniac added to the alkaline 

 folutions forms a chocolate coloured precipitate; 



16. Ammoniac will not combine with the white preci- 

 pitate. 



17. When pruffiate of pot-afh, or tincture of galls, are 

 added to the alkaline folutions, no effect is produced till an 

 acid is added, and then the ufual olive green and orange co- 

 loured precipitates are obtained. 



18. The acid and alkaline folutions are colourlefs. 



19. The white precipitate will not combine with fulphur 

 in the dry way. 



Vol, I.— January. D 20. It 



