236 MIND KNOWN TO US ONLY AS 



most works on physiology. They are strengthened, 

 also, by facts long known, on which the scientific part 

 of phrenology is founded, as well as by the more recent 

 experiments showing the localization of different 

 faculties in the brain. They are also illustrated by 

 the observations of the eminent mathematical physicist 

 Professor Tait, although, certainly, these were made 

 for a different purpose. When asked " to face the 

 question, where to draw the line between that which 

 is physical and that which is utterly beyond physics, 

 again our answer is, experience alone can tell us, for 

 experience is our only possible guide/' He defines 

 the proper field of physics " as concerned solely with 

 matter and energy and the phenomena depending 

 upon these ;" and adds, " All our reasonings in physics 

 must, so far as we know, be based upon the assump- 

 tion, founded on experience, that in the universe, 

 whatever be the epoch or the locality, under exactly 

 similar circumstances exactly similar results will be 

 obtained " (" Brit. Assoc.," 1872, p. 7). I submit that 

 experience shows this to obtain of the animated world 

 also, for throughout the whole of it, both plant and 

 animal, a similar structure and composition produce 

 exactly similar results, both bodily and mental ; ex- 

 cept as regards the immortal soul of man, and there all 

 knowledge from experience is wanting. I will go 

 farther, and say, that if a Frankenstein could construct 

 some animal say a dog or an elephant particle for 

 particle, exactly the material counterpart of some 

 existing one, it would have exactly the same, not only 

 bodily appearance and powers, but also mental powers, 

 including memory and acquired habits. All experi- 



