140 
The brain is not by itself alone an organ, by which we have 
sensation. It is in connection with the whole nervous system, 
specially with the spinal cord, which may be regarded as the 
true nerve-centre ; and thus the whole nervous system, 
“ nerves* and brain together, forms the sensorial organism 
essential to the immediate production of those mental phe- 
nomena which constitute our sensations.” 
“ The nervousf matter is of the same texture as the substance 
of the brain, in continuity with it, and forming one mass,” 
and the whole system is built up of nerve-threads and nerve- 
corpuscles. Sensory nervesj go from the periphery to the 
brain, and motor-nerves go from the brain to the muscles.” 
And, as the whole nervous system forms one organism, the 
sensorial affection may be immediate, and not progressive. 
The Professor admits that the whole organism is necessary. 
He speaks of “ certain” centres§ in the spinal cord, medulla 
oblongata, cerebellum, mesencephale, and basal ganglia ” ; 
and again he says, “ it is not merely the brain . . . but the 
brain in connection with the whole sensory and motor appa- 
ratus to the tips of the fingers.” 
It thus appears that the organism of sensation is “ a 
complex apparatus,” the brain being only a part of it, and 
the other parts being as essential as the brain. 
Now, to call the brain a single organ, and afterward to slip 
in the whole nervous system along with it, is not according to 
correct definition and precise use of language. It is also 
contrary to sound logic, and seems as illogical as reasoning 
from a particular term to a universal ; though it is quite in 
harmony with the author's speaking of “mind|| incerebrate 
and mind incorporate ” as synonymous phrases. 
Instead, therefore, of saying, “ The brain is the organ of the 
mind,” we should say the whole nervous system, brain, spinal 
cord, and nerves, to the soles of the feet, as well as “to the 
tips^f of the fingers,” forms an organism, through which, by 
means of the five organs of sense, the mind is furnished with 
sensations. 
The brain is connected with all these organs, and as all these 
are passive, so is the brain a passive instrument, and not a self- 
acting machine. 
The brain is not 'one but many, divisible into numberless 
atoms, “which exist near to each other, but are as little one as 
* Brown’s Philosophy , i., pp. 448, 458. + Ibid., p. 445. 
t Fortnightly Review, vol. xviii., p. 718. § Pages 104, 112. 
H Page 99. *f Page 112. 
