98 
MR. H. TOMLINSON ON THE INFLUENCE OF STRESS 
Experiment XXVIII. 
A wire of annealed silver, 8 feet in length and - 085 centim. in diameter, stretched 
by loading. 
Load in 
kilogs. 
Total increase of length 
per cent, produced by 
the load =A. 
Total increase of specific 
resistance per cent, 
produced by the load 
= B. 
Batio of 
B : A. 
5 
115 
6 
3-64 
+ •034 
•0094 
6| 
7-28 
+ •274 
•0376 
71 
'4 
9-38 
+ •246 
•0262 
Experiment XXIX. 
A wire of annealed copper, 8 feet in length and ’095 centim. in diameter, stretched 
by hand. 
Total increase of length 
per cent, produced by 
stretching =A. 
Total increase of specific 
resistance per cent, 
produced by stretching 
= B. 
Ratio of 
B : A. 
2-42 
+ 0-395 
•163 
4-84 
+ 0-649 
•134 
11-33 
+ 0-373 
•030 
23-36 
+ 0-296 
•013 
Experiment XXX. 
A wire of annealed iron, 8 feet in length and ’092 centim. in diameter, stretched 
by means of a lever, the stress produced by the weight of the lever being allowed to 
remain after the permanent extension had been completed. 
Total increase of length 
per cent, produced by 
stretching = A. 
Total increase of specific 
resistance per cent, 
produced by stretching 
= B. 
Ratio of 
B: A. 
375 
+ T29 
•034 
7-96 
•224 
•028 
11-85 
•384 
•032 
15-74 
•640 
•041 
