THE AUDITORY APPARATUS 133 



of the light upon the Scale. So will the middle ear — tested 

 by placing one electrode upon the forehead and another 

 over the mastoid — if it is affected by catarrh ; or it will 

 give a subnormal deflection when the bones are clogged 

 by urates. In much the same way the inner ear can be 

 made to disclose its degree of conductivity or neuro-elec- 

 trification by giving a measure of the nerve current in it 

 as compared with the hand to hand deflection of the patient 

 and a reading from the inner ear of a normally healtby 

 person. 



With the repair of any of these faults the electrician has 

 no concern, because they happen to occur in the human 

 body. If, however, they are considered anew in the light 

 of the hypothesis I have advanced, remedial measures will 

 readily suggest themselves to those medical men who are 

 familiar with the construction and manipulation of electrical 

 apparatus. 



