THOMPSON. — ON THE EQUILIBRIUM OF THE SYSTEM. 



435 



sion on the plates was found satisfactory. The terminals were copper 

 boxes filled with water. 



Figure 1 gives the calibration of the junction. The galvanometer 



7 8 9 10 11 12 



Kilowatts 



Figure 2. Calibration of Furnace. 



was a Siemens and Halske instrument made for this special purpose, 

 but which did not read as high as the melting point of platinum. 



In Table II and Figure 2 the calibration of the furnace is given. The 

 power was obtained from voltmeter and ammeter readings. The am- 

 meter scale read to five amperes and was connected to a current trans- 

 former with a ratio of 60 to 1. This instrument was not calibrated. 



