EFFECT OF PRESSURE UPON ARC SPECTRA.-NICKEL. 



Diagram 9. 



J45 



2 



Group 1 



o 







: 



Intensity 



14 



12 



10 



2- 



Group II 



10 



o 







I 



Intensity 



i 



VOL. CCXV. A. 



3 4 6 



2 K 



10 



