400 Scientifie Intelligence. 
value given by Nilson. Careful examination by Thalén with the 
spectroscope, proved Cléve’s scandia to be pure; hence he infers 
gamit a é 
e re 
dest of the fractions (RO mol. wt., 126-127) were united and sub- 
_ mitted to a long series of decompositions, one fraction being 
treated for ytterbia, another for yttria, and a third, intermediate, 
c 2 the concen * 
ie concentrated erbia. At the same time, he 
to concentrate the coloring matter in residues A, rich 
