Constituents of Dust and Soot from various Sources. 107 

 The Lines of Iron observed in different kinds of Soot. 



Laundry, 



Na D 



G- 



M 



N 



5893 -0 



4404 -9 



4383 -7 

 25-9 

 08-0 



4289 -8 

 16 -3 

 02 -1 



4144 -0 

 32 2 



4063 -7 

 45 -9 



3930 -4 1 

 28'0 J 

 23 -0 { 

 20-4/ 

 06-6 



3899-91 

 95 -8 J 

 86-4-1 

 75 -7/ 



Laboratory. 



65 

 60 

 56 

 50 

 40 

 34, 

 26 

 24 

 20 

 15 

 13 

 3799 

 98 

 95 

 88 

 49 

 45 

 35 

 33 

 27 

 22 

 20 

 09 

 05 

 3687 

 80 

 77 

 47 

 31 

 18 

 3585 

 81 

 70 



•6 

 •6 



■1} 



1 



5 

 •3 



n 



7 



61 ! 

 0J I 



4383 -7 



4216 

 4144 -0 



3930 

 28 

 23 

 20 



06 -6 



3} 



•6 



9-91 

 5 -8 J 



95 



86 -4 

 78 



'2-6 



60 

 56 

 50 

 40 

 34 

 [26 

 ^24 

 [20 

 15 

 13 

 3799 



01 f 26*0 "I 



5 | 1 24 -5 J 



88 -0 

 49-61 

 45-7J 

 35-0 

 33-4 

 27-7 

 22-6 

 20 -0 

 09-3 

 05-7 

 3687-6 



80- 

 77 -8 

 47-9 

 31-6 

 18-9 



3585 -5 



81- 3 

 70 -2 



Kite he 



Bed] 



3886 -4 

 Extremely 

 feeble 



3860 -0 

 Very feeble 



I 3824 -5 

 Barely yisible 



3930 



30 -41 

 28-0 J 

 23 -0 

 20 -4 

 06-6 

 99 -9 1 

 95 -8 f 

 86 -4^ 

 78-7 J 



3860-01 

 56-5 J 



3826 -0 

 24-5 

 20-5 



3749 -6 1 



3749 -6 



45-7 J 



45-7 



35 -o r 



35-0 



33 -4 J 



33-4 



3722 -6 1 



3722 -6 



20 -0J 



20-0 



The six last 



09 -3 



lines are 



05 -7 



very feeble 



3687 -6 





3677 -8 



Tlie two rubid- 

 ium lines 



4215 -8 and 

 4202 -4 almost 



coincide with, 

 two iron lines 



4216 -3 and 

 4202-1. 



