10 ACCOUNT OK CERIUJtf. 



was performed ; that the arfenic is fublimed, and adheres to 

 the neck of the retort ; that the three different fpecies of gas 

 are mixed, and may be collected in rlafks ; finally, that the 

 water, the oil, the acetous acid, and the oxide of arfenic, are 

 condenfed in the receiver; that thefe three laft. bodies, by 

 combining in certain proportions, form a very volatile com- 

 pound, heavier than water, and fparingly foluble in it ; and 

 that it is for this reafon that it feparates into two very diftinct 

 ftrata; the lower of which mutt be confidered as an oleo-arfe- 

 nical acetite, and the other as a portion of the firft diffolved in 

 water, which folution is promoted by an excefs of acetous 

 acid* 



IV. 



Succinate of 

 cerium. 



Account of Cerium, a new Metal found in a mineral Subftance 

 from Bajinas, in Sweden. By W. DTIesinger and J. B. 



Bergelius. 



(Concluded from Page 300, Vol. IX.) 



With Succinic Acid. 



(P.) Jl\T firft, fuccinic acid renders the faturated folutions 

 of cerium turbid, but afterwards they become clear. Thus, 

 a few drops of fuccinate of ammonia, poured into a faturated 

 nitric or muriatic folution of this metal, occafion a precipitate, 

 which foon difappears. On pouring in a greater quantity of 

 this re-agent, the fuccinate of cerium is immediately depofited. 

 This combination is white ; it is not wholly infoluble in water, 

 lince the folution from which it was feparated ftill retains a 

 little, as is manifefted by evaporation, or by alkalies. The 

 fait obtained by digefting free fuccinic acid with the oxide, 

 comports itfelf in the fame manner. The acid diflblves it 

 readily. Expofed to the fire, it burns with a blue flame. 



Since the acetate of cerium is not precipitated by the fucci- 

 nate of ammonia, this is a certain means of obtaining the ce- 

 rium freed from iron. 



With Gallic Acid. 



Callate of ceri- (2.) If cryftallized gallic acid isput into a faturated folution 

 um * of muriate of ferium, a fmall quantity of a white precipitate 



is 



