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of a state of consciousness acting on a molecule. Physical 
science offers no justification for either of these connections, 
the ordinary canons of science fail to extricate us from our 
difficulties, and therefore we conclude that there can be 
nothing but horses inside the locomotive. Even the facts, as 
terror, hope, calculation, &c., are almost as difficult to seize as 
the idea of the soul as their cause. But “ if you are content 
to make your soul a poetic rendering of a phenomenon which 
refuses the yoke of ordinary mechanical laws, I for one would 
not object to this exercise of ideality.” 
The reader will be able by this time to form some idea of what 
Prof. Tyndall intends, when he says that the phenomena of 
the soul, the soul itself, the possible action of matter on the 
soul and of the action of the soul upon matter are facts and 
phenomena which are scientifically unknown. They are un- 
known because they cannot be pictured to the mind, i. e., 
united in a mental picture with one another or with physical 
facts. If by picturing the soul or the mind is intended that it 
cannot be pictured as occupying space and as affecting the 
bodily senses, i. e., cannot be imagined as material substance, 
this is true ; but if it is contended that the mind cannot be 
pictured as the mind finds itself in its own operations, then it 
is untrue, and that it is untrue is affirmed by Prof. Tyndall 
himself every time in this discourse he says I see, or know, or 
remember, or believe. If he means that he cannot picture the 
mind as acting, we reply he can picture the acting of the mind 
as truly as he can picture the acting of the body. If he 
attempts to picture what he means by force, whether galvanic 
or mechanical, he will find this as difficult as when he attempts 
to picture mental force. If he cannot picture mind as acting 
on matter, or matter acting on mind, no more can he picture 
matter acting on matter. If he says that he knows nothing 
about mind, and that therefore psychical existence and psy- 
chical action cannot be used to explain any phenomenon because 
this would be to explain the unknown by that which is more 
unknown, he refutes himself every time that the word to know 
escapes from his lips. The brilliant essay by Prof. Tyndall 
himself On the Scientific Uses of the Imagination and the 
many sagacious and brilliant remarks which ho has made from 
time to time upon the processes and grounds of Induction are 
themselves decisive evidences that many phenomena in his 
own mind have been well considered by himself and causally 
connected. The entiro Theory of Modern Science, in which 
ho so much glories, and which in so many respects ho so well 
understands and expounds so skilfully, is an exposition of the 
operations of an agent within that body, which for the sake of 
