io B. E. Moore 



Table V has one 9-component line. The inner pair of ^-com- 

 ponents is a/2, but the other components are not related to it. 



Table VI has three 8-component lines and all differ. A rela- 

 tionship of the components is not apparent. 



Table VII contains one 7-component line. 



Table VIII contains seven 6-component lines. There are no 

 duplicates : and there are only three separations in the different 

 lines which correspond to a or multiple aliquot parts thereof. 

 For line 4178.2 A the components are (4, 3, 2) times .262, with 

 deviations respectively of -\-.012, — .006, and — .004, while (4, 3, 

 2) times a/4 would give deviations of — .05, — .05, and — .03 re- 

 spectively. Such deviations in a set of reading are certainly 

 exclusive. 



Table IX contains seven 5-component lines and no duplicates. 



Table X contains 166 quadruplets. The first row gives the s- 

 and the second the ^-components. Each separation represents 

 both a positive and a negative value. Under intensities the first 

 recorded refers to the red, the second to the blue component. If 

 the components are of equal intensities only one value is re- 

 corded. In overlaps the intensity, of course, arises from the red 

 component of one, and the blue component of the other line. 

 There are several duplicates, but among these duplicates I have 

 found no series. It is difficult to tell just when these lines may 

 be duplicates. They shade off by small values toward separations 

 which are quite different. In the triplets of yttrium and zirco- 

 nium I found the values to progress by almost insensible incre- 

 ments from very small to very large separations, and if there were 

 distinct types there was no separating them. The thorium quad- 

 ruplets behave in the same way, particularly if one includes the 

 unsymmetrical quadruplets. The quadruplets, however, have a 

 p- as well as an ^-separation, which gives one a double chance 

 to isolate types. We may choose the ^-separation equal to a/2 

 (.553) and find it represented in lines 4017.65 A, 3730.12 A, 

 3670. 12 A, 3470.08 A, 3445.87 A, and 3324.88 A. The corresponding 

 ^-separations for these lines are respectively 1.06, 1.28, .52, 1.29, 

 1.07, and .83. Here are evidently two pairs. The value .83 

 (=30/4) is the only one related to a. Similarly, if one were to 



98 





