62 C. Wolf.on the equivalent of Ceriwm. 
14684 gers, gave 01880 ers. of ae and 0°7717 grs. of ceros 
ceric ‘oxyd, which gave 0°7338 grs. of ceroso-oxyd. 
The sulphate contains therefore as follows : 
The anhydrous: The hydrous: ; 
Cerous oxyd, 57°310 49°973 
Sulphuric acid, 42°690 37°224 
r Pals 12°803 
100°000 100° ser 
I thought that a repetition of the same mode of pari 
might lead to a still greater reduction of the equivalent, ow 
to the removal of the foreign substance above alluded to. 
A portion of Ny was therefore treated as usual, and p 
duced the basic salt N9, 
After washing it was perfectly Mee though otherwise 
appearance similar to N, Na, N@ and Nj. 
The oxyds obtained, both from the oxalate, pe age from 
mother-liquor, and that from the basic salt, were white. In 
neither could the least trace of didymium be detected The 
— 13756 ers. gave 0° 1832 ¢ grs. water ea 07186 grs. of ceros0- 
_ ceric oxyd, yielding 0°68318 grs. of cerous oxyd. 
ae These results would give for : 
ee The crystallized salt 
a Cerous oxyd, --. 49°664 
SPER BOM, iso 37°018 
prepared 
Further investigations will be needed to ascertain, whethet 
_ acontinued repetition of the same operation can reduce 
) ageiylent of cerium to a still lower number. 
