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



Table IV. 

 Thermo-couple " W." 

 Initial pressure 325 mm . 

 a— -003665. 



Equation used for calculated temperatures same as in Tables 

 II and III. 



T = 51*72 + 0*112499E — 1*35512 X 10~ 6 E 2 . 



1907 



Thermo- 

 couple •• W" 

 Microvolts 



Temperature 



T (obs.)— 



Observed 



Calculated 



T (cal.) 



June 3 



4025 





482-10° 



482-58° 



- *48° 





4026 





482-15 



482-68 



— *53 





5009 





581-29 



581*23 



+ "06 





5017 



5 



582-22 



582-07 



+ /15 





5978 





675-32 



675-81 



— -49 





5974 





675-07 



675-43 



- -36 



June 4 



6238 



5 



700-88 



700-81 



+ *07 





6239 





701-05 



700-86 



+ *19 



June 6 



6992 





772-10 



772-07 



+ *03 





6988 





771-72 



771-70 



+ *02 



May 29 



7486 



5 



818-65 



818-00 



+ *65 





7495 





819-00 



818-78 



+ *22 



June 4 



7954 





860-52 



860-81 



— -29 





7952 





860-47 



860-63 



— -16 



June 5 



8488 



5 



908-47 



909-03 



- *56 





8488 



5 



908-57 



909-03 



- *46 



June 4 



9016 





955*30 



955-86 



— *56 





9011 





954-91 



955-42 



- -51 



June 5 



9474 





995-32 



995-91 



— -59 





9480 





995-86 



996'43 



- -57 



June 6 



9975 





1038-82 



1039*07 



— -25 





9940 





1035-65 



1035-22 



+ -43 





10197-5 



1058-50 



1058*53 



- -03 



Column 5, Table IV, contains the differences between 

 the observed temperatures and the temperatures calculated 

 with the equation used in the previous series (Table III) 



T= 51-720 + -11250E— 1-35512 X10- 6 E 2 . 



The average difference is 0*33°, and the maximum difference 

 0-65°. 



The agreement between this series of observations and the 

 preceding one is so extraordinarily close that not only the 

 same equation serves for both but the differences ** obs.-calc." 



