150 
Ho speaks of “ the sensory* elements of ideation stored up 
in centres ” ; but the centres are only numbers of atoms, and 
atoms cannot contain ideas. The one cannot be stored up in the 
other, as the one is mental and the other material. He says 
“ the sensory centres are the seat of sensation, sensory memory, 
and ideation.”f But memory and ideation are mental states, 
have their seat in the mind, and not in nerve centres. 
Again, he says that the “ motor J centres are the origin of 
motor stimulation, and the organic basis of motor memory 
and motor ideation ” ; that “ the motor centres are distinct 
from those which perceive and register sensations ” ; that 
“the sensory centres§ are registers of sensations in which 
they are stored up and capable of re-presentation in connection 
with their respective associations.” But the acts of per- 
ceiving and registering are acts of the mind, and not of 
numbers of material atoms j and sensations are mental states, 
which can neither be re-presented nor stored up in bundles of 
atoms. He also speaks of “the motor memory || and ideation 
of the right hand,” but memory and ideation belong to tho 
mind, and not to the hands, whether right or left. 
He says, it is “through*, the brain that we live subjectively, 
both in the past and present.” It is, however, rather through 
memory that we live subjectively in the past, and through 
consciousness that we live in tho present. Both of these 
belong to mind, and, therefore, it would be more correct to 
say, it is through the mind that wo live subjectively. -More- 
over, it has been said that life is manifested primarily in the 
heart, not the brain ; and it is as much through the blood, 
passing through the heart, that we live, as through the brain. 
The atoms of the brain are continually changing, and, there- 
fore, form a poor basis for memory. But “ there is some- 
thing** imperishable in memory, which is inexplicable on the 
supposition that the mental faculty is a mere function of any 
perishable organ like the brain, — something which appears to 
necessitate the conclusion that the mind, of which memory is 
a faculty, has its foundation deep down in spirit.” 
The paper says, “We retain an idea in the mind by the 
restraining influence which, through these higher centres, we 
can exert upon the other centres through which it may tend 
to diffuse itself.”tf Think of the Professor saying to a 
student, “Keep that idea in your mind.” The student asks, 
“How shall I do so?” The Professor replies, “By the 
* Page 115. f Page 116. 
§ Page 129. || Page 119. 
** Contemporary Review , vol. xxv., p. 134. 
t Ibid. 
Page 124. 
ft Page 123. 
