1910-11.] Temperature Coefficient of Concentration Cells. 387 
The Dolezalek electrometer is very convenient for experiments with 
high resistance solutions, and enables the stoppered vessels to be used with 
Silver wires. 
impunity, thus simplifying all the manipulation. The following is a 
diagram of the connections : — 
E 
C = cell being measured ; E = electrometer ; A = accumulator. 
It will be noted that no current beyond that necessary to charge the 
quadrants is ever drawn from the cell. 
The silver wires were pure silver obtained from Heralus. Cumming * 
* Trans. Faraday Society , 11th Dec. 1906. 
