724 



side, which can be distinguished from each other with difficulty. I 

 have not been able to observe anvthing similar for D^, there the 

 absorption maxima seemed single to me. At 274° I found about 

 0.035 A.U. for the distance of the two absorption maxima, of which 



o 



each component of D^ consists, at 290° about 0,045 A.U. The dis- 

 tances of the components of D^ indicated in the tigure refer to the 

 extreme components. The region lying between the absorption maxima 

 situated on either side is on the whole of uniform intensity, which, 

 chietly at the higher temperatures, is but very little greater than 

 that of the absorption maxima. Whether there are still more faijit 

 maxima in this region, I have not been able to observe with certainty, 

 though I now and then got the impression that such was, indeed, 

 the case. 



