1902.] 



and C cesium, and their Mutual Relations. 



305 



Rubidium 



Wave-length. 



Oscillation 

 frequency, 

 in vacuum. 



Intensity. 



x revious 

 measurement. 



Observer. 



Series 

 and 

 number. 









7950 -46 



Lehmann 





7799 







Very strong 



7805 '98 







6306 -8 



15851 -3 



1 









6299 -19 



870 -5 



9 



6297 



L. de B. 



I 4 



6206 -74 



16106 -8 



8 



6203 





h 



6160 -04 



228 -9 



5 



6159 



• ■ 



II 4 



6071 "04 



466 -8 



4 







II 4 



5724 -62 



17463-2 



8 



5724 '41 



K. and E. 



I, 



a 



5654 -16 



680 -9 



3 



5654 -22 



" 



Us 







48 -19 



699 -6 



7 



48*18 





I=i 



5579 3 



918 -1 



2 







II 5 



5432 05 



18403 -9 



6 



5431 -83 



K. and E. 



Ifi 



b 



5391 3 



543 -0 



1 







I Ifi 



63 -15 



640 -3 



5 



5362 -94 



K and E. 



Ifi 



22 -83 



781 -5 



1 









5260 *51 



19004 *0 



4 



5259 -8 



K. and E. 





34 -6 



098 



1 







% 



5195 -76 



240 -7 



3 



5194 -8 



K. and E. 



i/ 



7 



65 -35 



354-1 



2 









51 -20 



407 '2 



2 









l« 



5132 



480 



<1 



( 





II« 



5089 -5 



642 -5 



1 







I Q 



76 -3 



693 -6 



1 









In 



37 



847 



1 









23 



yo2 



1 



5021 -8 



K. and E. 



Iio 



17 



926 



<1 







I 9 



4983 



20062 



<1 







111 



67 



127 



<1 









4215 -68 



23714 -4 



9 



4215 -72 



K. and E. 



P 2 



02-04 



791 -4 



10 



01 -98 



>j 



P 2 



3591 -86 



27832 -8 



3 



3591 -74 



5! 



P 3 



87 '27 



868 -4 



4 



87 -23 



55 



P 3 



3350 '98 



29833 -5 



1 



3351 -03 



55 



P 4 



48 -84 



852 -6 



2 



48 -86 



55 



P 4 



3229 -26 



30958 -0 



1 







?5 



28 -18 



968 -4 



1 







P 5 



The isolated line \ 5165 -35 is narrow and sharp ; it differs, in these respects, 

 from the lines in the series. 



VOL. LXX. 



Y 



