380 



R = 



Computed values of 5c: 



1. 1.532 



2. 1.488 The average of Nos. 2, 3, and 4 was taken as the 



3. 1.487 value of 5c. 



4. 1.479 8c = 1.485 ±0.004 



4. Calibration Data for Observing Thermometer. See Part 

 IV, Sec. 7. 



Column 2 gives the resistance of the Standard Thermometer, and 

 Column 3 gives the resistance of the Observing Thermometer, the 

 units being ohms. The Extension Coil Link was in the 25 ohm posi- 

 tion. The readings in Column 3 were not made simultaneously with 

 those in Column 2 but were made as soon after as the bridge could be 

 reset. 



1. 6 May 1916. Oil Bath at 63.2 °C. 



Time 

 Mins. 







2 



4 



7 



9 

 12 

 14 

 17 

 19 

 22 



Averages 



Standard Thermometer 

 Ohms 



7.27945 

 7.27955 

 7.27923 

 7.27937 

 7.27917 

 7.27970 

 7.27952 

 7.27911 

 7.28018 

 7.27973 

 7.27950 



Observing Thermometer 

 Ohms 



5.01562 

 5.01578 

 5.01.575 

 5.01561 

 5.01566 

 5.01550 

 5.01572 

 5.01563 

 5.01562 

 5.01583 

 5.01567 



