AND RESISTANCE OF NICKEL WIRE AT HIGH TEMPERATURES. 49: 
(2) Measurement of resistance change due to applied field. 
ET Ge Deflection when Field is 
Direction Differ 
of Field. ifference. 
Off. | On. Off. 
| 
=F 113 169°8 114-4 56'1 
- UX, | 173 119°3 55-4 
ae 121 | 176 120°9 55 
- 122 17-9 122°5 55:5 
mean = 9A‘) 
Experiment I.— Field = 26:2. 
(1) Calibration of galvanometer. 
Reading on Scale when Current is Differ f 
Shunt in A. Deflection. ~ ee : 
Direct. Reversed. Direct. ree ae] 
| 
inf. 134 leg7 |, ie4 — 28-7 ay 
30 169 1278 a) G8" + 40°95 69°96 
inf. 133-5 163 | 133-7 — 29-4 aan 
30 169 Last, 4) = eo F413 70°53 
inf. 133°9 1629. | Isard — 29°05 av 
mean = 70°25 
2 (2) Measurement of resistance change. 
| 
Magnetic Reading on Scale when Current is Trorenice GE 
Field Poteet. Defiections 
; Direct. | Reversed. { Direct. i‘ 
off 150°5 146'5 149 + 3°75 se 
on — 239°8 57°5 234:7 +179°75 1855 
off 1415 155°9 140 — 15°25 a 
on + 231°5 64°5 229 + 165-75 186:2 
off 136°8 160 136 — 23°6 
mean = 185°9 
In the calibration experiments conducted as described on p. 41, the column 
headed ‘shunt’ indicates that in the second and fourth lines the resistance \ was 
slightly altered in value by joining in multiple arc a fairly large resistance and a small 
part of A. In Experiment I., 20 ohms resistance was joined up with a resistance of 
0°3085; in Experiment II., resistance 30 was joined up with resistance 0°5125. The 
