186 Dr. A. I). Waller. 



twenty-four hours, in the case of an ill-nourished cat. I regard this as 

 indicating brief survival of tissue. 



Fallacies due to anomalous polarisation require to be tested for and 

 excluded. In my experience this kind of fallacy is liable to occur 

 from a defectively amalgamated zinc, and is eliminated by reamalga- 

 mation. 



I have not thought fit to use tetanising currents with tissue, secondary 

 coil, and galvanometer in one circuit, but have always short-circuited 

 the galvanometer during tetanisation (any current in circuit being of 

 course neutralised by compensation), and non-short-circuited the galva- 

 nometer immediately after tetanisation. The time interval in this 

 proceeding has been about 1 second, and upon occasion ^th second. 

 I have not attempted to ascertain what the electrical state may have 

 been during this transfer-time. 



The following experiment is given to illustrate the fallacy of the 

 electrodes and its correction ; the explanation ottered of that fallacy is 

 only tentative. 



Preliminary Experiment to illustrate the Fallacy of the Electrode* and 



its liCntm-al. 



A pair of zinc rods, 1> A, in a U-tube, connected with a key-board 

 coil, compensator, and galvanometer in the usual way. 



