CONSCIOUSNESS AND SENSATION. 99 
enter into a complicated ganglion most developed 
in the part where vision is clearest, and it would 
be very hard to imagine that the fibres of the 
optic nerve emerging from the ganglionic corpus- 
cles correspond individually with distinct rods or 
cones. 
These being the objections to the received 
theory of sensation, they appear to me to warrant 
search for an escape from them, and I have been 
led, by the consideration of the properties of the 
living corpuscles of the body, and of what appear 
to me the established facts with regard to the 
actions of the cerebral hemispheres, to a hypothesis 
which I venture to put forward, believing it to 
furnish that escape, and to be in harmony with 
all that is known of the nervous system. 
But before doing so, I find it necessary to ex- 
plain and defend the view which I hold with 
regard to the connection between mind and brain, 
and which I have already in a few words suggested 
in a paper on the structure of the cerebral convo- 
lutions in the Quarterly Fournal of Microscopical 
Science (April, 1870.) We must inquire into the 
relations of consciousness with the hemispheres 
before we ask how it is brought into communi- 
cation with the finger-ends. 
The cerebral hemispheres, which are well ascer- 
