1Q23. 



THF AURORAL 5PECTRT'>! AVI^ THF AT^''~'5PHFRF. 



Identification of the lines. 



The obsenations carried out in the year 1912—13 gave the result 

 that the strongest lines in the blue part of the auroral spectrum were due 

 to Nitrogen and belonged to the socalled Negative band spectrum. 



Comparing the new lines found with those of the N-spectrum we at 

 once see that nearly all of them must be ascribed to Nitrogen. 



Table III. 



Auroral liius, 

 observed ivith spectograph. 



Lines of Xitrogen spectrum. 



On the left side of table III has been put up the auroral lines observed, 

 and on the right side the corresponding N-lines are given. In a column 

 headed "Tvpe" is given the type of spectrum which the lines belongs 

 to. The numbers and the classification are taken from : H. Kavser. Hand- 



