128 
Wave-length 
(Kayser) 
Are Spectrum 
Intensity 
and 
Character 
REPORT—1904. 
YTTRIUM—continued. 
Spark 
Spectrum, 
Exner and 
Haschek 
Lohse 
Arc Spark 
4752:970 
41°595 
33°637 
32°565 
28-710 
26°031 
04:818 
01°165 
4699-424 
96-976 
92°137 
89-938 
82-501 
78°523 
75°030 
71-020 
67-024 
66°567 
59-058 
58:497 
53951 
52°309 
43°863 
27390 
13°165 
04:977 
01:484 
4596°771 
90-972 
85°505 
82352 
81-954 
81-506 
79-043 
73°746 
70°855 
657120 
64:576 
59°558 
55-491 
54°651 
44-500 
42-222 
34:298 
27-983 
27°430 
22242 
14-190 
13°764 
06°139 
03°534 
4492-592 
91°924 
87°683 
87-433 
84621 
NE NRPNWNRFONWNPWNNNANAWNWNHNKENRWHE WR 
5 
WW EWN OWWNAPRNNWNWRNNHN RI DH 
4527-98 
27°43 
22°16 
06:12 
87°61 
Reduction to 
Vacuum 
——_- ee 
Oscillation 
Frequency 
in Vacuo 
