18 



Messrs. C. W. Waidner and F. Mallory on 

 Table VI. 

 Platinum Thermometer in Ice. 



Time. 

 May 6. 



Coils. 



Bridge- V\ 



T ire. 



Temperature 

 of Coils. 



R . 



5.00 



C, J), F, H... 



Coil cor. ... 



= 265 



+ •016 



B.W. Readg. 

 Cal. cor. 

 Zero cor. 



-6-589 

 + 047 

 -•003 



19-97 

 Temp, cor.- -002 



258-469 



5.10 



C, D, F 



Coil cor. ... 



= 260 

 + •017 



B.W. Eeadg. 

 Cal. cor. 

 Zero cor. 



-1-554 

 + •011 

 -•003 



19-97 

 Temp, cor.- -002 



258-469 



5.15 



C, D, G, H... 

 Coil cor. ... 



= 255 

 -•011 



B.W. Eeadg. 

 Cal. cor. 

 Zero cor. 



+3-509 

 -•025 

 -•003 



19-97 

 Temp. cor. -002 



258-468 



5.20 



FI, C 



Coil cor. ... 



= 260 

 -•005 



B.W. Readg. 

 Cal. cor. 

 Zero cor. 



-1-527 

 + •011 

 -•003. 



1998 

 Temp, cor. — -001 



258-475 



5.24 



FI,D,E,F,G,H 



Coil cor. ... 



= 255 

 + •179 



B W. Eeadg. 

 Cal. cor. 

 Zero cor. 



+3-320 

 -•024 

 -•003 



19-98 

 Temp, cor.— 001 



258-471 



5.29 



FI, C 



Coil cor. ... 



= 260 

 -•005 



B.W. Eeadg. 

 Oal. cor. 

 Zero cor. 



-1-527 

 +■011 



-•003 



19-99 

 Temp, cor.— 001 



258-475 



5.35 



C,D, F 



Coil cor. ... 



= 260 

 + •016 



B.W. Eeadg. 

 Cal. cor. 

 Zero cor. 



-1-550 

 + •011 

 -•003 



20 00 

 Temp. cor. "000 



258-473 



Mean 258-471 



This determination of R was made immediately after the preceding, the inner 

 nickel-plated calorimeter being first removed. The same freezing-mixture was 

 used, and the contacts of the platinum thermometer had not been touched. 



indicated by a time-chart. Moreover, the platinum ther- 

 mometer seemed to respond to the changes more rapidly than 

 the barometer, which appeared to have an appreciable lag. 



The observed barometric height, corrected for temperature 

 and errors of graduation of the standard metre-bar, was 

 reduced to 0° C, latitude 45°, sea-level. From the reduced 

 barometric height the temperature of the steam was obtained 

 by interpolation in Brocb/s tables of the pressure of aqueous 

 vapour, recalculated from Regnault's experiments (Trav. et 

 Mem. du Bur. Int. des Poids et Ales. t. i.). 



