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C 28 9 3 
XXI. Second Part of tlie paper on the Nerves of the Orbit. By 
Charles Bell, Esq. Communicated by Sir Humphry Davy, 
Bart. Pres. R. S. 
Read June 19, 1823. 
In these papers I endeavour, to the utmost of my power, to 
distinguish between the facts which I am able to substantiate, 
and the hypothesis by which I have been directed in my 
inquiries. I hope that the importance of the facts may give 
some bias in favour of that mode of reasoning by which they 
have been discovered, and an additional interest to anatomical 
studies. 
In my endeavour to arrange the nerves of the orbit, I 
encounter, in the first step, all the difficulties of my subject ; 
for although there be only nine nerves properly enumerated 
as proceeding from the brain, six of these go to the eye ; the 
second, third, fourth, part of the fifth, sixth, and seventh, 
go into the orbit, and may be said to be concentrated into a 
space no larger than a nut- shell. 
In this investigation it is not always possible to give de- 
monstrative evidence, or to answer opposition by cutting 
across a nerve ; here we must proceed on a minute investi- 
gation of the anatomy, and by reasoning, rather than by ex- 
periment : yet I shall demonstrate what was stated hypo- 
thetically, in a former paper,' that there is a correspondence 
between the compound functions of an organ, and the nerves 
transmitted to it. 
MDCCCXXIII. 
Pp 
