ON WAVE-LENGTH TABLES OF THE SPECTRA OF THE ELEMENTS. 12 
YTTRIUM— continued. 
Wave-length 
(Kayser) 
Are Spectrum 
Spark 
Spectrum. 
Exner and 
Haschek 
Intensity 
d 
an 
Character 
Lohse 
Are Spark 
| Reduction to 
| Vacuum 
a 
A 
1 
Oscillation 
Frequency 
in Vacuo 
7 
5196-588 
35°356 
* 23°380 
19-283 
03:941 
*5087°600 
73°344 
70°363 
07:134 
4982-297 
74466 
48:740 
31°129 
28°427 
26°503 
22-063 
12°236 
09-185 
06°275 
* 00°304 
4895-436 
93-620 
86-832 
86°464 
* 83°881 
81-629 
79°832 
79-339 
63-303 
60°031 
56-896 
55073 
54°437 
52-860 
45°862 
40:052 
39°335 
26°438 
23°497 
23°310 
21°813 
19°857 
18-396 
17-589 
04986 
04502 
4799°491 
87:078 
86°753 
81:217 
80-360 
66°280 
63°142 
61-169 
2 VISE SSI Ae aS IL la hale aad 
5:3 
* Rowland : 5123-390, 5087-610, 4900°301, 4883-867. 
19238°1 
