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ANIMAL ELECTRICITY. LECTURE VI. 



tainly more trustworthy. Here is such a record 

 (fig. 62,), of a series of alternating A.'s and K. 's at 

 one minute Intervals, with the temperature gradually 

 raised from 1 8° to 40*^ and then allowed to fall. There 

 are two principal points exhibited In this record, 

 which is a typical one ; firstly the fact that at about 

 40° the extrapolar currents are somewhat suddenly 

 diminished almost and sometimes quite to extinction — 



Fig. 63. — Influence of rise of temperature upon A. and K. 



which is evidence of their physiological character ; 

 secondly, the fact that in consequence of the rise of 

 temperature A. has diminished and K. has increased. 

 This last is, I think, a very characteristic and note- 

 worthy point. For referring back to the last two sets 

 of experiments, relating to the effects of acidification 

 and of tetanisation, we find that all three of these 



