400 
PHYSICS: H. NYQUIST 
The following is a brief summary of the results obtained in helium and 
neon: 
1. The equation connecting the displacement of a component and the 
electric field is of the form 
5\ = a + bE 
where a differs from 0 for many components. 
2. When a = 0, b is positive. Only two exceptions have been found 
to this rule, viz., He 4686 and He 3965. 
3. There are simple numerical relations connecting the values of a 
for the different components of a given Hne. Such numerical relations 
exist to a less degree between the values of b. 
4. The effect in the line He 4686 agrees qualitatively with that pre- 
dicted by Evans and Croxson on Epstein's theory. The numerical 
^ c c/ 
A I A ( K 
\ \ m\ i 
FIG. 1. 
value of the ratio of the distance between the outer components of H3 
24 24 
to that of He 4686, however, was found to be instead of 
32 _ 22 42 _ 32 
as predicted by them. 
5. Two new lines of the same type as those discovered by Koch were 
observed in helium. In neon, 34 such lines were observed. 
6. In the accompanying figure are shown some illustrations of the 
lines as they occur on the photographic plate. In these drawings the 
wave-length increases from left to right. The upper part of the illus- 
trations shows the line as it appears when the field is zero, the lower part 
shows the effect of the field. 
In the modified discharge tube used, the maximum value of the field 
occurs some distance above the cathode, instead of in its immediate 
vicinity. This causes the displaced lines to have the form shown in- 
stead of the simple Y shape given by Lo Surdo's tube. 
