ANIMAL AND VEGETABLE 61 



two equal lengths of wire and connect as before. Hold the 

 R electrode in the right and the L electrode in the left hand, 

 being careful that the pressure is equal. The sign of the 

 deflection is, we will say, positive. It follows, therefore, 

 that the R electrode is electrically positive to the other. 

 Leave the connections unaltered, but hold the R electrode 

 in the left and the L electrode in the right hand. If the 

 polarity is in the electrodes the sign of current will be the 

 same. But it is not. The deflection will be negative, 

 because polarity is in the hands and not in the electrodes. 

 In this connection proofs can be multiplied almost ad 

 infinitum, but I do not wish the case to rest upon my 

 unsupported testimony. 



In an article in the Lancet of January 13, 1917, Dr. 

 C. Nepean Longridge, F.R.C.S. Eng., M.R.C.P. Lond., 

 who has been examining and treating various cases on my 

 principles for some two years, says 



" Experiment 1. With the aid of Miss Flecker, at the 

 Ladies' College Physical Laboratory, Cheltenham, I 

 estimated the electrical resistance of a piece of oak-tanned 

 sole leather 3 in. long by 1 in. wide. We found that when 

 dry the resistance was practically infinity. When wet the 

 resistance is that of the fluid the leather has soaked in. 



" Experiment 2. One pole of the galvanometer was 

 connected to an electrode which could be held in the hand. 

 The other pole was connected by an insulated cable to a 

 copper plate imbedded in the earth. Another insulated 

 cable was connected at one end to the metal pipe supplying 

 water to the house, and at the other end to a brass rod of 

 1 in. section. After earthing myself I held the brass rod 

 in one hand and the electrode in the other, and obtained a 

 rapid off-scale deflection, showing, firstly, that an electric 

 current was coming from my body ; and secondly, that the 

 earth connexions were working properly, for the current 

 passed out by one hand through the brass tube to the 



