80 
Proceedings of the Poyal Society of Edinburgh. [Sess. 
components being the stronger to their being the weaker, the positions of 
the components changed from an abnormal dissymmetrical arrangement to a 
normal dissymmetry. On sending the current in the opposite direction, and 
thus reversing the magnet, there was no alteration in the dissymmetry. 
The same thing was done with a glass lens instead of a quartz one. The 
glass lens was of almost the same dimensions as the quartz one, but on mov- 
ing it, neither the intensities nor the positions of the components changed. 
The following table gives the details relating to examples of dissym- 
metry found in the spectrum of molybdenum. 
Table II. — Molybdenum. 
Field strength = 24,650 gauss. 
Wave- 
length. 
2672-91 
2924-45 
2941-37 
2944-97 
2946-10 
2993-00 
3014-29 
Cfl 
m 
n 
a 
a 
n 
a 
a 
a 
a> 
o 
P 
cS 
CO 
in 
c6 rj 
ll 
a: 
4-2 4^ 
go 
*rH 
ps 
QO 
-0-142 
0 
+ 0-123 
-0-149 
0 
+ 0162 
-o-ioo 
0 
+ 0-122 
-0-160 
0 
+ 0-150 
- 0-110 
0 
+ 0-131 
-0-160 
0 
+ 0-188 
-0-141 
0 
+ 0-144 
>> 
4^> 
• rH 
CA 
n 
a> 
Remarks. 
Min. inten- 
sity of mid. 
compt. 
Wave- 
length. 
3087*73 
3826-85 
3951-15 
4050-25 
4051*35 
420072 
£ 
m 
a 
a 
n 
n 
n 
n 
n 
T3 
in 
£ o * 
O 
£ I 
_ + © 
a> 
3 p- ® 
-£ g o 
»i-4 
°> 
CO 
QO 
-0-178 
0 
+ 0-217 
-0-196 
0 
+ 0-201 
-0-249 
0 
+ 0-244 
-0*145 
0 
+ 0-122 
- 0-122 
0 
+ 0-101 
- 0-112 
0 
+ 0-097 
-0*230 
0 
+ 0*205 
Remarks. 
Edge of 
plate. 
Middle 
of plate. 
Different 
rotations. 
Mid. compt. twice 
as strong. 
Again the concurrent changing of the dissymmetry with that of the 
intensities is striking. There are further exceptions also. The line A = 
3087*73 is interesting. At the centre of the plate the light had passed 
through the centre of the lens, but at the edge of the plate the light was 
