86 



Dr. W. M. Watts on the Spectrum 

 Table [continued). 







Manga- 





Bessemer. 



Spiegel. 



nese 

 oxide. 



Remarks. 



i 



(5547 



f 5547 







"I Group of three lines, the middle one the: 



Z\ 5532 



\ 5532 





\ strongest. In Bessemer and Spiegel 



| 5529 



[ 5529 





J only. 





' T5462 | 

 \ 5454 



f 5462 

 \ 5454 

 ( 5443 





1 Three faint lines, absent in the manga- 





[5443 





nese-oxide spectrum. 





5433 



5433 



5433 



Fine line. [red. 





5423 



5423 



5423 



Brightest edge of band, fading off towards 



7}< 



5405 







Line. 





5395 



5395 



5395 



Strong line. 





5391 



5391 



5391 



Edge of band. 





5371 



5371 





Strong line, absent in the manganese-oxide 

 spectrum. 





i 5359 



5359 



5359 



Bright edge of this group, which fades 









away towards the red. 



5327 



5327 





Strong line. 



5269 



5269 





Strong line, coincident with the solar lineE. ; 



("5229 



5229 



5229 



Edge of band. 



J5192 

 V ] 5167 



5192 



5192 



Edge of band. [trum.j 



5167 





Line, absent in the manganese-oxide spec-; 



[5157 



5157 



5157 



Edge of band. [trum.| 



(5107 



5107 





Line, absent in the manganese-oxide spec- 



5099 



5099 



5099 



Edge of band. 



i \ 5052 



5052 



5052 



Edge of band. 



5018 



5018 



5018 



Edge of band. 



1^4984 



4984 



4984 



Edge of band. 





4943 



4943 



Edge of band. 







4904 



4904 



Edge of band. 





4862 



4862 



Edge of band. 





4836 



4836 



Edge of band. 





4802 



4802 



Line. 





4783 



4783 



Line, forming edge of band. 





'4481 



4481 





Line. 





4432 



4432 





Line. 



K< 



4404 



4404 





Line. 





4383 



4383 





Line. 





k 4373 



4373 





Line. 



Of the Bessemer lines which do not occur in the manganese- 

 oxide spectrum, the following are due to iron :— 



5371, 5327, 5269, 5192, 5107, 4383. 



The line at 5167 is also nearly coincident with the double iron 



r i aq ) arj d tne e dg e °f tne Dan ^ at 5229 coincides nearly 



with the double Hue -l ^qo' 



Fig. 1, Plate V. shows these coincidences. Those lines only 

 of the iron spectrum are drawn which were actually mapped 

 together with the Bessemer-spectrum, when the two were seen 

 simultaneously. 



