46 
Mr Purvis, The influence of a strong magnetic field 
The middle constituent vibrated parallel, and the two outside ones 
perpendicular to the lines of force unless stated otherwise. The 
measurements of each triplet were from the centre of the middle 
constituent. 
X 
dX/X 2 
5013-4 
The constituents were too weak to measure. 
5006-7 
+ i-io 
0 
-1-10 
| The most refrangible constituent was very weak. 
4998-9 
+ 1-32 
0 
-1-32 
4990-4 
+ 1-56 
0 
-1-57 
4981-1 
+ 1-62 
0 
-1-63 
4840-1 
J- The constituents were too weak and diffuse to measure. 
4804-4 
4758-6 
+ 1-53 
0 
-1-52 
4757-1 
do. 
4682-12 
+ 1-51 
0 
-1-53 
4667-80 
+ 1-63 
0 
-1-65 
4656-70 
Too weak and too diffuse. 
4617-50 
+ 1-64 
0 
-1-64 
4572-24 
+ 1-28 
0 
-1-29 
4564-0 
+ 1-08 
0 
-1-09 
4555-71 
-1-2-12 
0 
-212 
