and Bands in the Spectra from Swedish Bessemer Works. 99 



suggestions as to the origin of some of the bands and lines measured 

 by Mr. Lundstrom. 



The Nykroppa Specti 



A. A. 



6079 is probably 6075 

 6028 " „ 6026 



5712 



5629 

 5532 

 5338 

 5135 



5688 

 5619 

 5537 

 5340 

 5138 



CaO 



Na 



Na 



Fe 



Fe 



K 



C 



Remarks. 



These have all been observed in 

 oxyhydrogen flame spectra. 



Three bands in the green have been referred to phosphorus ; but 

 it is very difficult to admit that this element, in any form, can give 

 rise to their appearance in the Bessemer flame. I have shown that 

 phosphorus pentoxide yields a spectrum of its own, and is not dis- 

 sociated in the oxyhydrogen flame ; also that ferrous phosphate yields 

 the bands of phosphorus pentoxide. 



It is just possible that when the blast is charged with moisture a 

 compound cf phosphorus and hydrogen may be formed in the 

 presence of much carbon ; but, on the other hand, such compounds 

 show the green bands of phosphorus only when the flame is cooled, 

 and, as that which issues from the mouth of the converter is intensely 

 hot, the bands are scarcely likely to be visible. 



In parallel columns are here given — 



I. Measurements of the bands of phosphorus. 

 II. Measurements of bands in the Bessemer flame spectrum of 

 Langshyttan. 



III. Bands to w r hich it is suggested the Bessemer flame spectrum 

 should be referred. 



I. 



Phosphorus. 

 A. 



5590 

 5255 

 5110 



II. 



Bessemer. 

 A. 



5581—5608 

 5264 

 5103 



III. 



Reference bands. 

 X. 



Probably 5608 Mn. 



5270 Mn. 

 5110 Fe. 



The Spectrum of the u Blue Flame." 



Several of the lines and bands measured in the spectrum of the 

 " blue flame " are easily reproduced in the oxyhydrogen flame, others, 

 however, which have been observed in the spectra which I have 

 photographed at the Crewe Works of the London and North-Western 



