312 
occur. Hence in the search for series by the aid of equal resolutions 
hardly any result can be obtained by means of these curves. I have 
also tried it for tin and for antimony lines, which had a splitting 
up between 60 and 65, but likewise with no success. 
[ further examined whether there existed simple relations between 
the distances of the components for more than triple resolutions, 
which were rather accurately measured (weight 3 or 4). For Sb 3740, 
Sb 2671, and Sb 2878 1 did not find simple relations. For Sn 3331 
the distances of the components are in the ratio of 3:2, when the 
values 59,3 and 39,5, which lie within the limit of errors, are taken 
for them. For Pb 2802 the ratio is also as 3:2 with the values 
49,1:32,7, Pb 2873. gives 54,7:410—4:3; Sb 3723 gives 
72,6 : 36,3 = 2:1. There is, however, no mutual connection or a 
simple relation to the normal resolution. 
The results may be briefly summarized as follows: 
The Zreman-effect was measured of 35 tin lines, 23 lead lines, 
27 antimony lines, and 16 bismuth lines. In this deviations were 
found with Purvis’ results which refer only to a few lines, probably 
in consequence of his less accurate measurements. No relation was 
found between the resolutions of those lines of the examined metals 
for which it was proposed to arrange them in series or those which 
are arranged according to the laws of the 2°¢ kind of Kayser and ~ 
Runer. The resolutions are pretty regularly distributed between 
values which amount to about 1 and 1,5 times the normal resolution. 
As an incidental result [ found that a number of lines given by 
SCHIPPERS for antimony, are not real. 
