222 



Elongation. 



235 

 232-7 

 2317 

 232-1 



R. Straubel : Experiments on the 



Maximum deflexion, in scale-divisions. 

 +5-6 



Zero 

 reading. Elongation 



239-4 



239-4 

 239 



2363 



236-6 



235 



237 



237 



245 



243-6 



2406 



240-7 



241-4 



4-4 



-5-3 



-4-9 



-4-9 



Mean —49 



+4-6 



4-4-3 

 +5-7 

 +4-3 



+4-9 



on establishing a field, since the same temperature change 

 occurred at both sets of junctions. The following set of 

 observations was obtained immediately after the set given 

 above : — 



Elongation. 



234 



233-7 



234-6 



234 



235 



Zero 

 reading. 



234 



233-7 



234 



234 



234 



234-4 



234-8 



234 



234-8 



234-6 



Elongation. | Maximum deflexion, in scale-divisions. 



234-4 



234-2 



234-5 



234-8 



234-3 



+0-3 



-03 



+02 



0-0 



4-0-4 

 Mean 4-0-1 



4-0-4 



4-0-2 



+ 0-5 



4-00 



-0-5 



4-0-1 



Similar results were obtained by inclining the vulcanite 

 box, thereby displacing the plates so that the junctions of the 

 thermopile were no longer between the plates. This was 

 more convenient, as it did away with the necessity of touch- 

 ing the plates, and it was unnecessary to wait a long time 

 before thermal equilibrium was established. 



