New Mineral from Sussex County, New- Jersey. 39 



B. 



(1) A mass weighing nearly an ounce, and containing a 

 very few small grains of the oxide of iron, was broken from 

 the corner of one of the specimens. Weighed by means of a 

 very accurate hydrostatic balance, it appeared to have a spe- 

 cific gravity of 3.25. 



(2) This mass being first crushed into fragments in a steel 

 mortar, all the extraneous matter was carefully picked out 

 with a forceps ; it was then reduced to impalpable powder, by 

 long grinding in an agate dish. 



(3) Fifty grains of the powder were boiled for half an hour 

 in nitromuriatic acid, the solution assumed a rich yellow co- 

 lour, and a considerable residuum was left, which, separated, 

 washed, and dried, had lost in weight exactly 27 grains. 



(4) The insoluble portion (3) was then put into a silver 

 crucible, with 70 grains caustic potassa ; water being thrown 

 on, the mixture was boiled, evaporated to dryness, and final- 

 ly fused. The fused mass was softened by water, and sepa- 

 rated from the crucible ; muriatic acid being then added, the 

 solid matter swelled up into a gelatinous mass. This was 

 evaporated to dryness, being constantly stirred throughout the 

 process, and afterwards boiled for two hours in very dilute 

 muriatic acid. The whole was then thrown upon a filter, and 

 carefully washed ; the insoluble portion, when dry, was found 

 to weigh 16.3 grains, was white, with a faint and hardly per- 

 ceptible tinge of rose colour. 



(5) The nitro-muriatic solution and washings, (3) and the 

 muriatic solution and washings,(4) having been mixed, liquid 

 ammonia was added in excess, which threw down a red pre- 

 cipitate ; the supernatant clear liquor was poured off, the 

 residue thrown on a filter and washed, and the liquor with the 

 washings set by, for further experiment. See (12). 



(G) The precipitate (5) was redissolved in a small quantity 

 of muriatic acid, and the solution concentrated ; tartrate of 



