TUNGSTEN. ? 



2 1 . Persulphate of iron with excess of acid Ditto ; redissol- 



ved on agitation. 



22. Sulphate of nickel O. 



23. Nitrate of cobalt A light pink precipitate. 



24. Sulphate of manganese A copious white precipitate in 



powder. 



25. Sulphate of zinc A white precipitate,, redissolved by 



agitation. 



26. Nitrate of lead A white flocky precipitate. 



27. Muriate of tin A copious white flocky precipitate. 



28. Sulphate of copper A white precipitate in powder. 



29. Nitrate of mercury Copious milk white flocks. < 



30. Nitrate of silver A copious white flocky precipitate. 



3 1 . Muriate of platinu m O . 



32. Muriate of palladium O- 



33. Soda-muriate of rhodium O. 



From the preceding table it appears that sul- 

 phuric, nitric, and muriatic acids have a stronger 

 affinity for ammonia than tungstic acid; but 

 phosphoric, arsenic, chromic, and the vegetable 

 acids are incapable of disengaging that acid from 

 ammonia. 



The tungstates of barytes, strontian, lime, 

 alumina, iron, cobalt, manganese, zinc, lead, tin, 

 mercury, copper, and silver are insoluble, or nearly 

 so. But tungstates of magnesia, nickel, platinum, 

 palladium, and rhodium are probably soluble in 

 water. 



After some attempts to analyze the tungstate 

 of ammonia, I was induced to abandon that salt 

 as not likely to yield satisfactory results, and to 

 have recourse to- tungstate of soda. 



E 2 



