320 



NATURE 



\_Augiist 4, 1881 



Final Reduction — Iron. 



Wave 

 length and 

 length of 



39 

 0600 



2 

 0622 



4 

 0920 



lOIO 



1755 



3 

 I8J5 



2950 



5160 



2 

 5210 



3 



5423 



4 

 6215 



3 

 6571 



7555 



3 

 757S 



4 

 7685 



S320 



9520 



3 

 9750 



Coincilences with Short Lii 



Mu Ce 

 ■3 4 



Ce 



4 



Mo 

 3 



Mo 

 3 



Va 

 4 



Til 

 3 



Ru 

 3 



Ta 

 4 



Mo 

 3 



Ru 

 3 



bodies which received it, and it was therefore quite easy to | would do for the blue rays another paiticular kind of substance 

 imagine, and one was justified in hoping that as the work went would do for the red rays and for the green rays, and so on. 

 on we should find, that what one particular kind of substance 1 Capt. Abney in his lectures will show you that the spectro- 



