: | : rally sufficed to give the amount of water, 
same disti 
‘ams 
rid of calcium, was 
56 C. Wolf on the equivalent of Cerium. 
poured off, the salt washed twice with boiling water, and 
purified salt dried over a water bath. S 
Upon being tested with the spectroscope, the mother-liqt 
showed the whole absorption spectrum of didymium, wi 
istinctness as a moderately concentrated solution 
didymium would do. 
_A solution of the purified crystals gave such lines asi 
didymium spectrum are usually marked by their intensity. 
small portion of the mother-liquor precipitated by oxali 
gave on ignition of the oxalate an oxyd of a brown color, wait 
: c C, . c. 
C, and C, were analyzed. 
3 weighed in a tared plati “ple: 
was transferred into a es erin platinum crucible; 
of which was a thick - | : 
crucible rested, fully surrounded by air, The large eruci 
