58 



Dr. G. Gore. 



trolyte to about half the height of the tubes D and E, care being* taken 

 to exclude all bubbles of air, and the lid of the cup is coated with 

 grease over that portion upon which the end of the tube F is to stand ; 

 the cup is then placed upon the bung B, and the latter inserted tightly 

 in the cylinder, and the cylinder fixed steady. Two corks (secured 

 upon the ends of stout platinum wires, about 20 centims. long) are now 

 inserted in the ends of the tubes D and E, and the cylinder A nearly 

 filled with the lighter and colourless electrolyte. The electrode of the 

 tube F is now fixed in position by means of a cross-bar of cork. The 

 tube (enclosing one of the platinum wires) is next simultaneously 



Fig. 1. 



immersed, together with the electrode Gr, in the liquid, and its lower 

 end very slowly and carefully placed so as to stand perfectly flat and 

 watertight upon the lid of the cup. Both the upper end of the tube F 

 and of the electrode Gr are now fixed tightly in the cylinder by means 

 of pieces of cork. The cork from the tube E is then withdrawn with 

 extreme slowness, so as not to destroy the definite meniscus, and then 

 the one in D similarly removed. The current from five or ten (or 

 more) Grove's elements is now at once passed from G to H (before 

 the liquids in D and E have time to mix), and the effects upon the 



