on the spark spectra of titanium, chromium and manganese. 69 
X 
dX/X 2 
3216-61 
+ 1-24 
3183-44 
0 
- 1-20 
3181-57 
+ 1-53 
3180-82 
0 
- 1-50 
3172-20 
3169-31 
+ 1-77 
3152-34 
0 
-1-73 
3140-26 
+ 1-79 
3135-86 
0 
-1-77 
3135-46 
3134-43 
+ 1-83 
3132*20 
0 
-1-81 
+ 1-76 
3128-82 
0 
-1-76 
+ 1-61 
3125-12 
0 
- 1-59 
+ 1-94 ; 
3122-73 
0 
-1-93 
+ 1-30 
3120-50 
0 
- 1-28 
+ 0-67 
3118-78 
0 
-0-67 
3116-86 
3115-77 
+ 1-93 
3107-70 
0 
- 1 -95 
Too weak to measure. 
The constituents were very diffuse. 
J 
Too weak to measure. 
| The most refrangible constituent was not so strong as the least 
j refrangible one. 
| Too weak to measure. 
! The most refrangible constituent was not so strong as the least 
I refrangible one. 
Too weak to measure. 
Too weak and widened into 3135 ‘86. 
Too weak to measure. 
\ The middle constituent was very little stronger than the two 
j outside ones. 
\ The general appearance of this triplet was quite different from 
the others : it had two outer sharp and strong constituents, 
1_ and a broad diffuse weak middle one ; the width of the 
latter was as great as the distance between the two outside 
ones. The two strong constituents vibrated parallel to the 
lines of force, and the middle one perpendicular thereto. 
) The middle constituent was removed by calcite, and was very 
little stronger than the two outside ones. 
Too weak to measure. 
) 
