CEYLON BRANCH — ROYAL ASIATIC SOCIETY. 165 



date that I have not been able to carry them on to any- 

 great extent. I shall not fail however to prosecute my re- 

 searches until the difficulties be overcome. 



I will now add to this an enumeration of the various 

 tests employed by me in the above experiment. 



Test employed. 



Acetic Acid 

 Phosphorous Acid ... 



Sulphuric do. 



Muriatic do. 



Nitric do. 



Protochloride of Tin and Platina do. 



Bichloride of Gold 



Sulphydro-Vinic Acid 



Molybdic Acid 



Nitrate of Ammonia ... 

 Nitrate of Nickel 

 Chloride of Cobalt ... . 

 Proto- Sulphate of Iron ... 

 Sulphate of Copper ... 

 Oxalate of Ammonia ... 

 Sulph-hydrate of Ammonia 

 Persulph hydrate of — do. . 



Chlorhy drate of do. . . 



Carbonate of do. .. 



Caustic -do. .. 



Color imparted 

 to the Solution. 



Precipitate. 



i ellow 



JNone. 



A n 



uo. 



x enow. 



do. 



do. 



CIO. 



Orange. 



do. 



do. 



la do. 



xled. 



do. 



Orange. 



do. 



do. 



do. 



.. Red. 



do. 



. Pale Yellow. 



do. 



do. 



do. 



Brown. 



Pale 



Dark Brown. 



do. 



do. 



Orange . . 



,. Red. 





do. 



do! " 



do. 



Pink 



None. 



Yellow . 



.. Red. 



do. 



do. 



All the acids employed were in a very diluted state as 

 when concentrated they would have destroyed the coloring 

 matter. 



The precipitate when heated emits violet vapours ; burns 

 to a fine coal, and finally to a grey ash in rather abundant 

 quantity. These appear to contain amongst other matters 

 Potash, Soda, and Iron, 



