Flame Spectra observed at Swedish Bessemer Works, 79 







A. 



±A. 





Notes. 



J 



I 



1 



i - 



La 



r 7 3 



y< 7-2 



! u 



!, {! 

 -{il 



4 

 5 



4 

 1 

 1 



3 



20 



12 



14 



21 

 12 

 14 

 15 

 16 



3 

 7 



2 



6705 

 6252 

 6208 

 6176 

 T5895 

 \5889 

 5855 

 5823 

 5781 

 5608 



5581 



5426 

 ("5389 

 15387 

 5353 

 5264 

 5227 

 5189 

 5160 



5103 

 5043 

 5002 



3 2 



2- 9 

 1-24 



}- 



0-65 







a-9 



0-84 

 jo-5 



0- 5 



1- 24 

 0-7 

 11 



0-9 



3- 9 



1 -96 



o-o 



Li 

 Mn 2 Q 3 

 Mn 2 3 

 Mn 2 3 



Na 



Na 

 Mn 2 3 



K 



K 

 Mn 2 3 



Mn 2 O a 



Mn 2 3 



Mn,0 3 



Mn.,0, 

 Mm0 3 

 MnoO, 

 Mn 2 3 

 My) 2 3 



Mn 2 3 

 Mn 2 3 

 Mn 2 3 



Strong line ; always seen, 

 "j Three red lines of strong bands 



\- on a continuous bright back- 

 J ground. 



Fine band. 

 Faint line. 

 Faint line. 



G-reen band shading away towards 

 the red. 



Strong broad green band shading 

 away towards the red ; the 

 brightest band of the spectrum, 

 ""j Distinct bands ; y 2 appears as a 

 I double line; y x terminates this 

 [ group, shading away towards 

 J the red. 



1 Equally broad and bright bands, 

 > Si forms a natural boundary 

 of the group. 



f The bands of this group always 

 i appear very indistinctly and 

 <j are only of short duration, 

 j The group seems to shade 

 ^ away towards the violet. 



The Bessemer spectrum can conveniently be divided into five 

 groups, a, (3, 7, 8, e. The group a refers to the red field on the less 

 refrangible side of the sodium lines. In this group the Langs- 

 hytte spectrum has, in addition to the distinct Li line 6707, only 

 three lines or narrow bands that appear on a light continuous back- 

 ground. This continuous background, on which the whole spectrum 

 appears, extends towards the violet side as far as the eye can see (H), 

 and towards the red side with a gradually fading brightness, so that 

 the Li line appears on a dark ground. 



The double ISTa line 5893 appears with a dazzling brightness, and 

 almost darkens the adjacent parts of the field. When the spectrum 

 has gained its full development, the Na group often appears as a 

 broad bright band divided by a reversed line. On the right side of 

 the Na line three groups appear, (3, 7, B, that are sharply denned by 

 the green bands (3 h 71, and d v . These have such effulgence that the 

 adjacent parts or the continuous background towards the violet are 

 made to appear as if there were absorption-bands at these places. 



In the group /3, and /3 2 are bands, the brightness of which 

 decreases towards the red side, and of which f$ x is the brightest. 

 Commonly even /3 a appears as a rather distinct narrow band. Once 



