1888.] 



Spectrum of the Aurora. 



321 



eo to oo 



N M N 

 CO CO CO 



<M 00 



co to 



to to 



^ co i> t> i> _, 



iam w io ic £ 



tO tO tO LO O J§3 



<M i-H <M 



eo co co 



to tO tO 



r->. tO 



to tO 



to g 



bo 



)« 



CO ™- 



<M OS 



i> co 



-4-3 

 J 



CO rH 



52 co 



Q 

 CD is 



03 £ :0 i ^ O 



Pi 





! ! * '. '. 





; : M • ■ 





: :ph" ; : 



* |> 



g ■ : 





:5 : 9 la 

 5 "B § -SP 8 



O ,— i . a <a 93 93 "qj 





° a 





a 



'So 





[So 

 "C 





nils 



o 



to <8 





93 



a ^o 



CD o 



,0. 



bab] 



(D 

 Vi 



*a 



o 





Q 



Ph 





