GOO 
PROFESSOR J. A. EWING ON EXPERIMENTAL 
Effects of Stress on Residual Magnetism (April 11, 1882), Plate 63, fig. 39. 
Load. 
Magnetoineier.* 
Load. 
Magnetometer. 
0 
450 
9 
263 
in earth’s field 
10 
253 
0 
440 
11 
244 
residual 
12 
233 
1 
436 
13 
192 
2 
3 
429 
410 
Wire drew about 5 per cent. 
4 
387 
121 
192 
5 
360 
12 
193 
6 
335 
11 
1931 
7 
317 
10 
194 
8 
302 
9 
195 
•7 
303 
8 
195 
6 
306 
7 
1931 
5 
310 
6 
189i 
4 
314 
5 
181 
3 
318 
4 
166 
2 
324 
3 
146 
1 
329 
2 
127 
0 
330 
1 
103 
Cycle 0 — 8—0 made six times; then 
0 
1 
81 
84 
0 
300 
2 
89 
1 
298 
3 
96 
2 
296 
4 
107 
3 
292 
5 
121 
4 
288 
6 
134 
5 
284 
7 
147 
6 
279 
8 
155 
7 
2741 
9 
160 
8 
270 
10 
162 
7 
272 
11 
162 
6 
275 
12 
161 
5 
278 
13 
1591 
4 
282 
12 
160 
3 
285 
11 
161 
2 
290 
10 
162 
1 
294 
9 
163 
0 
3C0 
8 
1631 
1 
2974 
7 
163 
2 
295 
6 
161 
3 
2911 
5 
157 
4 
287 
4 
148 
5 
282 
3 
135 
6 
279 
2 
118 
7 
274 
1 
98 
8 
269 
0 
78 
* In this series, one division of the magnetometer scale corresponds to 3=O’77 in c.g.s. units befo 
stretching, and 3=0 - 8 after stretching. The initial value of 3 was, therefore, 346. The final reading 
of 78 divisions gives 3 = 62. Each kilo, of load corresponds to a stress of 2'08 kilos, per sq. mm. before 
stretching, and 2’18 after stretching. 
