194 Intelligence and Miscellanies. 



a glass tube coming from the flask, upon which the finger 

 was placed, and which was used as a safety tube to prevent 

 the contents of the vial from rushing over into the flask) that 

 the evolution of sulphuretted hydrogen had ceased. Floc- 

 culi of silex were seen floating through the solution, thus in- 

 dicating that the integrity of the substance was partially 

 overcome. It was separated from the insoluble residue by the 

 filter, and a stream of chlorine gas passed through it, to bring 

 the iron it was supposed to contain, to the maximum of ox- 

 idation. 



2. A portion of the solution (1.) was decomposed by am- 

 monia. The precipitate was of a deep reddish brown color, 

 and the supernatant liquid remained perfectly colorless. 



3. The colorless liquid (2.) was evaporated to dryness in 

 a platina capsule, over an alcoholic lamp. As it approached 

 to dryness, a smart decrepitation was noticed. The residue 

 was healed to redness, after which, water was boiled upon it 

 for a few moments, and the solution separated from the inso- 

 luble part by the filter. 



4. To a portion of this solution (3.) oxalate of ammonia 

 was added, which occasioned no cloudiness. 



5. To another portion was added nitrate of silver : a pre- 

 cipitate immediately made its appearance. 



6. Another portion contracted no cloudiness from muriate 

 of platina or tartaric acid. 



7. A portion of the solution (3.) was now evaporated 

 nearly to dryness, and set aside to crystallize by spontane- 

 ous evaporation. After the liquid was entirely evaporated, 

 small cubic crystals were seen by the aid of a magnifier. 



8. The residue, (3.) not soluble in water, was treated with 

 muriatic acid, in which it was immediately taken up. To 

 the solution was added carbonate of potash : no precipitate 

 made its appearance until after the ebullition of the liquid, 

 when a copious one ensued. 



9. The precipitate by ammonia-(2,) was dissolved in mu- 

 riatic acid, and to the liquid, rendered neutral by evapora- 

 tion, was added a few drops of chloride of lime: no red 

 flocks made their appearance. 



10. A part of the original muriatic solution was decom- 

 posed by potash in excess, and after being boiled for some 

 time was separated from the precipitate. To it was added 

 muriate of ammonia, which occasioned no cloudiness. 



11. The portion of the stone (1.) which refused to dis- 

 solve in muriatic acid, was treated with double its weight of 



