18 



KEPOBT — 1876. 



It will thus be seen that B and C are practically equal at the temperature3 

 given, while A does not diflfer very much from these. D and E are not very 

 different hiter se, but differ somewhat from the first three; while G, con- 

 sidering its small coefficient, is considerably out. 



Statement of standard temperatures. — If we consider B and C to be right 

 at the temperatures given above and reduce the others so as to be equal 

 to them, we should get the following Table of standard temperatures ; — 



Results of control experiments. — In the next place we give the results of 

 our control experiments, in which the several coils were nursed to tempera- 

 tures very near those given in the Keport, and then compared with each 

 other. The small deviations from the temperatures in the Beport arise from 

 thermometer corrections. The differences thus found are given side by side 

 with those calculated from the data given above ; the differences are given 

 in the next column, and in the last the greatest possible difference, owing to 

 an error of 0°-l C. in temperature determiuation. 



It appears, therefore, that the differences between the observed and calcu- 

 lated values are always less than what would arise in the most unfavourable 

 case, owing to an error of 0°-l C. in the temperature determinations. 



