(§4 Gulvanic Experiments. 



light upon the theoVy ; and they will consider it their duty 

 to lay their results before the public if ihev obtain any that 

 are worthy of attention. 



r repeated this experiment, changing the poles and sub- 

 stitutinji platina wires in place of the gold ones. It was 

 then in the solution of muriate of soda corresponding with 

 the positive pole that I obtained the muriatic acid. The di- 

 stilled water communicating with the negative pole greened 

 the tincture of violets very strongly. It had contracted a 

 slight taste, and was a little turbid : the salted waltr in the 

 tube on the positive side preserved all its transparency. 



I made the same experiment with two tubes, both of them 

 filled with a solution of muriate of soda. In this experi- 

 ment, as in the two others, it was also the positive pole that 

 gave the muriatic acid, and the negative pole that mani- 

 fested the alkaline characters. In this last tube the solu- 

 tion was slightly turbid. The two solutions feebly oxidated 

 the platina wires. The gas liberated on the negative pole i* 

 always most abundant, even when this side contains pure 

 water. 



These experiments were continued several days, with a 

 pile of 15 pairs onlv, of zinc and copper ; this was sufficient 

 in order that the effects should be manifested very strongly, 

 as well by the smell and taste of the licjulds, as by their ac- 

 tion upon the vegetable tinctures. 



M. Uiffault, at whose house the committee of the Gal- 

 vanic Society met, repeated the experiment made by the 

 committee, of which he has given the preceding account ; 

 substituting, however, the nitrate in place of the muriate of 

 soda in the tube communicating with the negative pole. He 

 also soaked in a solution of nitrate of soda the pieces of cloth 

 cm'j.,loyed in the composition of his piles. ■ The Galvanic 

 effect was very feeble in this apparatus ; it was only sensible 

 at the positive po'c; i. e. in the tube of distilled water. No 

 bubble appeared upon the gold wire in contact with the ne- 

 gative pole which entered into the solution of nitrate of soda. 

 The solution of muriate of soda was then substituted for 

 that of nitrate of soda, but only used for the clolh of the 

 piles. This change produced more ciicct, but still in the 



disliiled 



