72 



Prof. H. A. Rowland on a 



Elements. 



Ca 



Fe 



Ca' .... 

 A(wv) . 

 ? ..., 

 Ca .... 

 Fe ... 

 Ca ... 



? ... 

 Fe ... 

 A(wv) 



? ... 

 Ti 1 

 Fe) 

 A(wv) 



CH 



Fe ... 

 A(wv) 



? ... 

 Fe* ... 

 Fe ... 

 Fe ... 

 Fe ... 

 Fet ... 

 Ni ... 



? ... 

 Fe ... 

 Fe ... 



? ... 



? ... 

 LiJ - 

 Ca§ ... 



? ... 

 Fe ... 

 Fe ... 

 Fe ... 

 Ni ... 



m ... 



Fe ... 



Fe ... 



Fe ... 



Fe .., 



Fe .., 



Fe ... 



Fe ... 



Fe ... 

 A[0]|| 



In Arc. 



Inten- 

 sith. 



10 

 9 



5 



Appear- 

 ance. 



R 



31 



In Sun. 



75 

 10 



t? 



Inten- 

 sity. 



Appear 



ance. 



2 

 30 

 6 

 1 

 2 

 4 

 5 

 4 

 4 

 3 

 5 



2 

 3 



Kind 



of 

 Stand- 

 ard. 



O" 



0" 







0" 



0" 

 0" 

 O" 



o 

 0' 





 0" 



O" 



o 



O" 



0" 



o 



o 



0i 

 0" 



0" 

 0" 



o 



0" 

 0" 

 0" 

 0" 



o 





 M 



O 











0" 



0' 



0" 



0' 



O 



0' 



0" 



0' 



0' 



0' 



0' 



0' 



0' 



Weight. 



In 

 Arc- 



In 



Sun. 



7 



6 



8 

 10 



9 

 10 



7 

 10 



7 

 12 



11 



6 



13 



13 



6 



5 



7 



11 



12 



9 



7 



10 



4 



6 



10 



10 



12 



ib 



10 

 7 



12 

 7 

 9 



10 

 5 

 6 

 8 

 5 

 7 

 6 

 5 



10 



11 



Wave- 

 length 

 in Arc. 



Wave- 

 length 

 in Sun. 



6708-070 



6462-835 



6471-881 

 6480-264 

 6482 099 

 6494-001 

 6495-209 

 6499-871 

 6516315 

 6518594 

 6532-546 

 6534-173 



6546-486 



6552-840 

 6563-054 

 6569-461 

 6572-312 

 6574-477 

 6575-179 

 6593-161 

 6594115 

 6609-354 

 6633992 

 6643-882 

 6663-525 

 6663-696 

 6678-232 

 6703-813 

 6705-353 



6717-934 

 6722-095 

 6726-923 

 6750-412 

 6752-962 

 6768-044 

 6772-565 

 6787-137 

 6807-100 

 6810-519 

 6820-614 

 6828-850 

 6841-591 

 6843-908 

 6855-425 

 6867-461 



* There is a water-vapour line near to violet side. 



t There is a faint line near to each side. 



I With bat little material in the arc this is a difficult triplet. The violet 

 component is very strong, the red component about half as strong, and between 

 them but nearer the red component is a very narrow line much weaker than 

 either of the others. (J.) 



§ There is a side line towards the violet. 



|| This line and the following one are at the beginning of the head of B. 

 There is a fine line midway between them, 



