Evolution of Mind. 265 



in our " Monthly Reviews " * that " the investigations 

 of physicists make it highly probable that all move- 

 ments of matter, even those of a molecular character, 

 are linked with electrical phenomena ; " that " all 

 molecular chemical changes in inanimate nature are 

 associated with changes in the electrical state ; " that 

 " all our methods of producing electricity and our 

 electrical machines are but imitations of processes 

 and mechanisms familiar in nature ; " that " experi- 

 ments have elicited electric currents in our skin, 

 muscles, and nerves ; " that " nerve fibres are not 

 subject to much wear and tear, and act like metallic 

 conductors conveying currents of electricity ; " that 

 " observers with the galvanometer have explored the 

 spinal cord and brain and, in a sense, tapped the 

 wires of the living telegraphic system ; " that " when 

 the brain is in full action currents probably flash 

 in thousands of directions, and pursue paths, the 

 intricacies of which are many times greater than if 

 all the telegraphic and telephonic wires of London 

 were concentrated in one vast exchange;" that "it 

 is only a matter of detail to demonstrate the exis- 

 tence of both animal and human electricity." Finally, 

 when we remember that the electric fishes have been 

 known since the time of Aristotle ; that the shocks of 

 the torpedo were demonstrated to be electric in 1773 ; 

 and that Galvani, over a hundred years ago, surmised 



* "Human Electricity," Prof. M'Kendrick, Fortnightly Review, 

 May 1892 ; also in Physiology of the Senses, by Profs. M'Kendrick and 

 Snodgrass, 1897. 



