122 A Few BemarJcs on Noberfs Nineteenth Band. 



The stage micrometer is probably not greatly to be relied upon, 

 and the covering glass may slightly differ in thickness from that of 

 the Nol^ert plate. It is also coarsely ruled, but considering these 

 circumstances, these last determinations accord fairly with those 

 deduced from the Nobert plate previously. 



In conclusion, I wish to say that I claim no merit for the 

 resolution of the fine lines of Nobert's nineteenth band, and never 

 have claimed any; what I claim, and all that I claimed in my 

 former communication is, that the method employed by me for 

 testing the character of the Hnes observed is, in a scientific point of 

 view, entirely trustworthy. 



