54 



Prof. H. A. Kowland on a 



In Arc. 



Elements 



Fe . 



Fe . 



Fe . 



Fe . 



Fe . 



Fe . 



Mg. 



Si . 



Fe , 



Fe , 



Fe 



Fe , 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Si 



Fe 



Ca 



Ca 



Fe 



Ca 



Ca 



Fe 



? 



? 

 Ca 

 Fe 



I* 



Fe 



Ca 

 Fe 



? 



? 

 Fe 

 Fe 

 Fe 

 Fe 

 Fe 

 Fe 

 Fe 

 Fe 



? 



? 



Fe 



Fe 



? 



Fe 



Inten- 

 sity. 



Appear- 

 ance. 



5 

 4 

 3 

 3 

 5 

 6 

 100 



15 

 7 

 8 



10 

 8 

 7 

 5 

 5 



15 



2 

 1 



6 



7 

 4 



5 

 5 



io 



25 

 15 



7 



10 



15 



E 



In Sun. 



Inten- 

 sity. 



Appear 

 ance. 



cl? 



Kind 



of 

 Stand- 

 ard. 



M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 O 



o 



M 

 M 

 M 

 M 

 M 

 M 

 0' 

 0' 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 M 

 0' 

 0' 

 M 

 M 



O 

 M 



Weight. 



In 

 Arc, 



In 



Sun, 



Wave- 

 length, 

 in Arc. 



2825-667 



2832-545 



2838-226 



2843-744 



2844-085 



2851-904 



2852239 



2881-695 



2912-275 



2929-127 



2937-020 



2947-993 



2954-058 



2957-485 



2965-381 



2966985 



2967-016 



2970-223 



2973-254 



2973-358 



2981-570 



2983-689 



2987-410 



2987-766 



2994-547 



2995-074 



2997-430 



2999-632 



2999-7 



3000-976 



3001-070 



3006-978 

 3007-260 

 3007-408 

 3008-255 

 3009-327 

 3009-696 



3016-296 

 3017-747 

 3019-109 

 3019-752 

 3020-611 

 3020-759 

 3021-191 

 3024-154 



3025-958 

 3027-245 



3037-505 



Wave- 

 length 

 in Sun. 



3005-160 

 3005-404 



3012-557 

 3014-274 



3024-475 

 3025-394 



3035-850 

 3037-492 



