108 E. E. Lawton — Bands in the Spectrum of Nitrogen. 



Accompanying this article is an enlarged drawing of the 

 band X 399S. The drawing is made to scale; and the intensity 

 of the different lines indicated in the drawing. (I) is the 

 band itself (last triplet estimated, too faint for measurement). 

 (II), (III) and (IV) show the triplets resolved into series. 





h-i M hH 



<i ■ M M 



M 









—- ffin — ~ "\ — 





" ' - _ ' . . . ' - r " r - 





— — ■- — ' .•■*, . — 





— ~ — — — — — 









. i 









^°° v ^°r^r*'"* aa T°T* 



&8£8&gB£!z)ttS£&B8i8tiS88sgt 







^SSS^^SS 







r^^ss^^z^s^ 









-~ ««**— 













»^iiiST»WrW-l"ViTif"ii^' -.-^--w^.-. : . 















======== 









^zzz^^^^. 





m**-**™,*™*-**-******** - 























Z^^^^^,. 













— — 



— 



— — 







^--"-T--""—-" . 













— — —■*-*- 





In conclusion, it is a pleasure to acknowledge my indebted- 

 ness to Professor Arthur W. Wright, who obtained the excel- 

 lent photographs used in this investigation, and whose kind 

 criticisms and advice were continually of great assistance. 



