448 ANALYSIS OF THE 



.2. Muriate of barytes produces an immediate turbidness, 

 and rather copious precipitation, which is very shghtiy, 

 if at all removed by nitric acid. 



3. Nitrate of silver gives a very dense and abundant preci- 



pitate. 



4. Water of potash produces a turbid appearance, not very- 



considerable. 



5. Carbonate of potash throws down an abundant precipi- 



tatE) which disappears with effervescence on adding ni- 

 tric acid. 



6. Lime water causes no change. 



7. Ammonia does not cause any precipitation, nor does it 



even impair the transparency of the water. 



8. Oxalate of potash, or of ammonia, occasions a copious 



precipitation. 



9. Tincture of galls has no immediate sensible effect ; but 



after an hour or two a purplish tint is exhibited, which 

 deepens from exposure to the air, and inclines to olLve- 



green. 



These results establish the following conclusions : 



Exper. 1. proves that no free acid or alkaline matter is pre- 

 sent, nor any alkaline carbonate. 



Exper. 2. denotes the presence of sulphuric acid. 



Exper. 3. indicates the presence of muriatic acid. 



From Exper. 4. and 5. may be inferred the presence either 

 of lime, or magnesia, or both. 



Exper. 6. and 7. prove that magnesia is not present, nor 



argil. 

 Exper. 8. proves the presence of lime. 

 Exper. 9. indicates a minute portion of iron. 



^ . The 



