48 
MR. H. TOMLINSON ON THE INFLUENCE OF STRESS 
Number of trial. 
Number of 
measures employed 
for the load. 
3 
6 
9 
3 
G 
9 
3 
6 
9 
O 
O 
6 
9 
Q 
•J 
6 
9 
3 
6 
9 
Temporary alteration 
of resistance. 
188-0 
383- 0 
58L0 
189-0 
381-0 
581-0 
188-0 
384- 5 
583-0 
189- 5 
384- 0 
583-5 
188-0 
385- 0 
583- 0 
190- 0 
384-0 
584- 0 
The mean values for three, six, and nine measures are respectively 188'8, 383’G, and 
583*1, and none of the observations differ from these mean values by *7 per cent. 
Thus for the first three measures we obtain a mean alteration of 188*8, for the 
second 194*8, and for the third 199*5. 
Experiment II. 
The same wire as in the last experiment, after having been repeatedly loaded with 
13 measures, was tested with the same weights as before with the following results:— 
Load in measures. 
Temporary alteration 
of resistance. 
Average alteration 
per measure. 
Difference between 
consecutive averages. 
3 
207-0 
69-00 
6 
416-7 
69-45 
•45 
9 
629-4 
69-93 
•48 
Experiment III. 
A piece of platinum (1) annealed, which had been repeatedly loaded with 12 kilogs. 
Number of kilogs. 
in load. 
Temporary alteration 
of resistance. 
Average alteration 
per kilog. 
Difference between 
consecutive averages. 
4 
108-5 
27-13 
6 
163-5 
27-25 
•12 
8 
219-0 
27-38 
•13 
10 
277-0 
27-70 
•32 
12 
339-0 
28-25 
'55 
