106 



Dr. G. Gore on the Relation of Volta 



electrolyte to pass per hour whilst under the pressure of a 

 vertical column of 30 inches of mercury. The electrolyte 



Fiff. 3. 



was a solution of 18*7 grains of chlorate of sodium per ounce 

 of water, and was allowed to completely saturate a perfectly 

 clean diaphragm previous to the experiment being made. 

 The entire arrangement was fixed upon a board. 



After placing the tube A horizontal until the two electrodes 

 became neutral it was quickly raised to the vertical position: 

 a current and deflexion of 10 degrees was gradually produced 

 in about three minutes. This current was permanent, but 

 gradually diminished to 6 degrees on removing the pressure. 

 Several trials were made, and in each case the electrode which 

 was under pressure was positive to the other. By repeating 

 the experiments with a pressure of 52 inches height of mer- 

 cury, a deflexion of 12 degrees was obtained. The experi- 

 ments were repeated with the apparatus modified by having a 

 glass tube about 3 metres long fixed to the end E and filled 

 with the electrolyte, with the second electrode transferred to 

 its distant end : whether this glass tube was horizontal or 

 vertical, the effects of varying the mercurial pressure were 

 substantially the same as in the previous experiments. These 

 results show that difference of pressure alone was sufficient to 



