M BXFERIMBNTS OIT ALlAVITE. 



(r.) Prussjate of mercury. A light yellow precipitate, 8e« 



luble in nitric acid. 

 (3.) Infusion of nut gallb. No change. 

 (4.) Gallic acid. No change, 

 (5.) Oxalate of ammonia. No change. 

 • (6.) Tartrate of potash. No change 



(7.) Phosphate of soda. No change. 

 (8.) Hydrosulphuret of ammonia. Copious black flocks. 

 Liquor remains trnneparent. 

 ; (9.) Arseniate of potash. A white precipitate. 



- (1 0.) Potash. • \ Copious yellow-coloured 



(H.) Carbonate of soda. > flocks ; readily distiolved in 



(12.) Carbonate of ammoria* J nitric acid. 

 (13.) Succinate of ammonia. A white precipitate. 

 (14) Benzoatc of potash. A white precipitate. 

 (15.) A plate of zinc, being put into the solution in muriatic 

 acid, became black, and threw down a black powder, 

 which was insoluble in sulphuric, nitric, muriatic, nitro* 

 muriatic, acetic, and phohphoric acids, in every tempera* 

 ture, whether tbe&e acids were concentrated or diluted. 

 (l6.) A plate of tin, put into the nitric solution, occasioned 

 - ..-?)4&o change. 



i-fl/y.) A portion being epclosed in a charcoal crucible, ant} 

 • x,€xpQsed for an hour to the heat of a forge, wab not re^ 

 duced to a metallic button^ nor could any trace of it bij 

 detected when the crucible was examined, 

 Theie proper- These properties were all that the small quantity of the 

 eTthose of e- "^*^^**"^ ^" "*y po^^esi^ion enabled me to ascertain. They un- 

 rium, equivocally point out a metallic oxide. Upon comparing 



them with the properties of all the metallic oxides known, 

 none will \^t found with which this matter exactly agrees. 

 Cerium is the metal, the oxides of which approach the 

 n'earest. The colour \» nearly the same, and botji are pre- 

 cipitated white by prussiate of potash, succinate of am monia, 

 but w|th some and bpn^oi^te of potash. But, in other respects, the two 

 <iinereace». - j^^tanpes diifer entirely. Oxide of cerium is precipitated 

 white by oxalate of ammonia and lartrate of potash; our 

 oxide is not precipitated at all: Qxide of cerium is pre- 

 cipitated white by hydrosulphuret of ammonia; while our 

 oxide is precipitated black : Oxide of cet'ium 19 not precipi- 

 tated 



