9 



}- 



}- 



COLUMBIUM. 77 



state the effect of reagents upon rather a dilute 

 solution of this salt in water. The reader may 

 compare these effects with the corresponding 

 experiments by Hatchett* 



, XT , Action of 



1. Prussiate of potash IN. o change. reagents on 



2. Gallic acid The liquid assumed a fine orange, inclining 



to red, but no precipitate fell. 



3. Tincture of nut galls The same. 



4. Sulphuric acid 



5. Nitric acid J A milk white precipitate in flocks. 



6. Muriatic acid 



7. Phosphoric acid 



8. Chromic acid J Milk white flocks. 



9. Acetic acid 



10. Arsenic acid O. 



11. Oxalic acid O- 



12. Tartaric acid O. 



13. Oxalate of Ammonia Q' 



14. Tartrate of potash Q. 



15. Nitrate of lead A copious milk white precipitate in 



flocks, not redissolved by nitric acid. 



16. Sulphate of copper A milk white precipitate. 



17- Nitrate of silver A copious milk white precipitate. 



18. Sulphate of zinc A milk white precipitate. 



19. Sulphate of manganese The same. 



20. Nitrate of mercury The same. 



4. My next object was to analyze this colum- Analysis of 

 bate of soda, in order to determine the atomic 

 weight of columbic acid. 



(1.) When 34*25 grains of these crystals were 

 heated on the sand bath, they lost their silky 



* Plul. Trans, for 1802. 



