Table 2.

Some observed multiplets involving the 6s ⁴P levels

	4P5/2 82236.17	6 s 4P3/2 82661.57	4P1/2 85576.93
5p ${ }^4{\mathrm{P}}_{5/2}^{°}$	(1700)	(20)
74672.32	7563.85	7989.25
${ }^4{\mathrm{P}}_{3/2}^{°}$	(750)	(110)	(500d)a
75009.13	7227.04	7652.44	10567.80
${ }^4{\mathrm{P}}_{1/2}^{°}$		(338)
75814.00		6847.57	——
5p ${ }^4{\mathrm{D}}_{7/2}^{°}$	(1250)
75521.50	6714.67
${ }^4{\mathrm{D}}_{5/2}^{°}$		(1800)
75697.05	——	6964.52
${ }^4{\mathrm{D}}_{3/2}^{°}$			(10 w)a
76743.08	——	——	8833.85
${ }^4{\mathrm{D}}_{1/2}^{°}$			(55)
78865.72			6711.21
5p ${ }^4{\mathrm{S}}_{3/2}^{°}$			(24)
79178.33			6398.60

^aThese two lines were observed photographically.