A. L. Day and J. K. Clement — Gas Thermometer. 445 



E.M.F's of the standard thermo-couple "W" for these cali- 

 brations. 



As a check against accidental errors of observation, all 

 observations were made in pairs, with an interval of from five 



Fig. 8. 



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4000 5000 6000 7000 8000 9000 10000 



Fig. 8. Curves showing the systematic differences (much magnified) 

 between the observations and the parabola which best represents them. 



For the dotted curve the ordinate (above and below the full curve) 

 is 1 div. = 0-2°. 



to ten minutes between. The constants of the equation : 

 T = 51-72 + 0-112499E — 1'35512 X 10" 6 E 



