262 Proceedings of the Royal Society of Edinburgh. [Sess. 
presented by h and the transverse field by t. The corresponding changes of 
resistance will be represented by capital letters H and T in accordance with 
the following convention. 
The four changes of resistance which form one set will be H, H(T), T, 
T(H), with the meanings 
H = effect of cyclic h, no transverse field existing; 
H(T) = „ „ „ h superposed on steady transverse field ; 
T= „ „ „ t, no longitudinal field existing ; 
T(H) = „ „ „ t superposed on steady longitudinal field. 
Results for Steel: dN/NxlO 4 . 
Longitudinal 
Field. 
i 
Transverse Fields in ( ). 
(864) 
(1282) 
(2141) 
(3781) 
(53-7) 
H 
4- 2*84 
+ 2-72 
4- 2-77 
4- 2-89 
H(T) 
4- 0*3 
+ o-i 
4- 0-19 
4- 0-01 
T 
- 4*59 
- 5-53 
- 6-29 
- 7-05 
T(H) 
- 7"55 
- 9-12 
- 9-86 
- 1037 
(843) 
(1268) 
(2111) 
(3706) 
(104) 
H 
4- 5T5 
+ 5-19 
4- 5-29 
+ 4-75 
H(T) 
+ 0-86 
+ 0-31 
4- 0-29 
+ 0-22 
T 
- 4-44 
- 5-64 
- 6'31 
- 6-73 
T(H) 
-10-34 
-11-39 
-12-25 
-12-4 
(606) 
(1268) 
(3706) 
(157) 
H 
*+ 6-47 
+ 6-69 
. + 6-45 
H(T) 
+ 3-12 
4- 1-08 
4- 0*5 
T 
- 3-99 
- 5-91 
- 6-77 
T(H) 
- 7-75 
- 12-53 
... 
-14-3 
Results for Iron: dN/N x 10 4 . 
Longitudinal 
Field. 
Transverse Fields in ( ). 
(898) 
(1282) 
(2156) 
(3796) 
(59-6) 
H 
4- 3-83 
+ 4-58 
4- 3-76 
4- 3-79 
H(T) 
4- 1-17 
4- 0-49 
4- 0-36 
4- 0-04 
T 
- 2-7 
- 5-48 
- 7-84 
- 8-98 
T(H) 
- 4 92 
-10-11 
-11-51 
-12*46 
(1282) 
(2156) 
(3781) 
(120-4) 
H 
+ 6-25 
+ 6-83 
+ 6-24 
H(T) 
4- 2-43 
+ 0-52 
+ 0-09 
T 
- 5-73 
- 7-97 
- 9-41 
T(H) 
- 10-83 
- 13-0 
-15-8 
