Si-EtlFIC HEAT OF AMMONIA. 



373 



2. Ratio of Volt Box Coils. See Part IV, Sec. 3. 



Column 4 gives the potential drop across the large coil of the volt 

 box including the leads to the heating coil ; column 5 gives the poten- 

 tial drop across the small coil of the volt box. The drop across the 

 small coil was read, in each case, immediately after the drop across 

 the large coil. The temperature readings are room temperatures in 

 the neighborhood of the coils. 



Determination of Ratio of Volt Box Coils. 

 10 May 1916. 



Wolff Potentiometer #2868. 

 Weston Cadmium Cell # 14.58. 



3. Calibration Data for Standard Thermometer. 

 IV, Sec. 6. 



See Part 



Resistance at 0° C. 



(Extension Coil hnk in 25 ohm position.) 



1. 3 April 1916. 



Time Resistance 



Hrs.:Mins. Ohms. 



2:18 0.87280 



2:19 0.87276 



2:20 0.87275 



2:21 0.87274 



2:22 0.87277 



2:24 0.87273 



2:27 0.87263 



