378 CAROLINE W. BALDWIN. [Vol. III. 



(B) Region lying betiveen 31 00 and 3440. 



72 lines were mapped, all of which were confined to the central 

 blue sheath. 



(C) Region lying between 3440 and 3928. 



135 lines were mapped, of which 



125 were present in the violet, 

 96 were present in the blue, 

 58 were present in the yellow. 



Of those which were invisible or very faint in the central violet 

 sheath, although strong in the outer sheaths, the following are 

 readily placed in Rowland's Standard List : ^ 



3812.12^ 3832.45 Mg. 



3812.20 Ic. 3834-36 Fe. 



3812.34J 3838.43 Mg. 



3815.98 Fe. 3841.19 FeMn. 



3820.59 FeC. 3856.52 Fe. 



3827.03 Fe. 3860.05 FeC. 



(D) Region lying between 3930 and 4550. 



Throughout this region photographs were taken in the five posi- 

 tions indicated in Fig. 3, as a, 2, 3, 5, and 6. 

 213 lines were mapped, of which 



211 lines were visible in central violet sheath {a), 

 200 lines were visible in outer violet sheath {2), 

 179 lines were visible in blue sheath (3), 



175 lines were visible in inner yellow sheath (5), 

 57 lines were visible in outer yellow sheath (6). 



The two lines absent from the central violet appear to be 



\.r \ T^ \ Rowland's scale. 

 4076.96 Fe j 



^ Rowland, Astrophysical Journal, T., p. 29, 1895. 



