CHAP. IV. §.V. NOT DUE TO THEEMO-ELBCTErC ACTIONS. 51 



Experiment 3. o 



Temperature of external cell ... 67 



Temperature of internal cell . . . ISO- 

 Vibrations ; and 



o 



Temperature of external cell ... 81 

 Temperature of internal cell . . . 110 



In whatever manner the experiments were varied, 

 whether by using water at greater or less differences 

 of temperature, similar results were obtained. The 

 vibrations were sharp and quick at the commence- 

 ment, but soon terminated; in no instance could 

 a decided effect upon the needle be obtained by 

 making and breaking contact, and the effects were 

 not in any way similar to those observed in the 

 animal body. There is one remark, however, which 

 might be made in reference to these experiments, 

 viz. if the two fluids could be kept at constant tem- 

 peratures at the point of contact, more decided effects 

 might be expected. 



In the following experiments a resistance — a liquid 

 conductor — was added to the circuit, to see if the 

 current would be capable of traversing it. A glass 

 tube, nearly half an inch in diameter and 3 inches 

 in length, was bent thus, U> and contained water; 

 one limb was connected with one of the mercurial 

 cups by a piece of copper wire of the same thickness 

 as those connected with the galvanometer, ^and 

 3 inches in length ; the other limb of the tube was 

 connected with another mercurial cup by a similar- 



