1908-9.] Vibrational Neutral Points in Magnetised Iron. 
7 
Table I. — Decreasing Cyclic Field. Mechanical Vibrations. 
r- * 
V ibrations superposed 
upon 
Vibrations regarded as superposed 
upon H = + T34. 
o 
Q 
X 
£ 
H = +T34 
reduced from 
H= + T9. 
H= - T34 
reduced from 
H= -D9. 
Average 
readings. 
Summation. 
Summation x 2’95 
= Total change of B. 
2*2 
-3 
3 
-3 
- 3 
- 9 
3-6 
-0-5 
0-5 
-0-5 
- 3 5 
- 10-5 
4-8 
2 
- 3 
2*5 
- 1 
- 3 
5-9 
4 
- 6 
5 
4 
12 
69 
11 
- 9 
10 
14 
41 
7-8 
14 
-10 
12 
26 
77 
8-7 
12 
- 18 
15 
41 
120 
9-6 
22 
- 24 
23 
64 
189 
10-4 
26 
- 18 
22 
86 
254 
i>- * 
Vibrations superposed 
upon 
Vibrations regarded as superposed 
upon H = + IT. 
o 
Q 
X 
& 
H= + ri 
reduced from 
H= +T9. 
H= - IT 
reduced from 
H= -1-9. 
Average 
readings. 
Summation. 
Summation x 2’75 
= Total change of B. 
2-2 
-5 
5 
-5 
- 5 
- 15 
3-6 
-3 
3 
-3 
- 8 
-24 
4-8 
-2 
1-5 
- 1-75 
- 9-75 
-29 
5-9 
- 1 
-0-5 
-0’25 
- 10 
-30 
6-9 
1 
-1 
1 
- 9 
-27 
7-8 
4-5 
-3-5 
4 
- 5 
- 15 
8-7 
2 
-4 
3 
- 2 
i 6 
9*6 
6 
-8 
7 
5 
15 
10-4 
9 
-7 
8 
13 
38 
Curve H = 1T of fig. I. Curve H = D34 of fig. 
