the finger-like processes ; the foot; the channeled 
‘bodies, and chambers of the optic nerves, which are formed in the 
side ventricles; great valve of the brain; front and back joining ; 
four oval bodies, the nates and testes ; the pine-apple gland, e: 
‘called from its shape: supposed by some to be the seat of the sou bs 
the pituitary, or mucus gland; the white eminence ; and the legs 
of the brain : all of which can only be learnt upon the subject, ei -—— 
natural or artificial. Its arteries are the internal head, and the aes 
tebral. -Iis veins return from the outer or back part of the brain, 
and evacuate themselves into the twenty-two venous canals of the 
outer membrane. Use, it is the organ of all the senses. ee 
Hinder Brain.—A small brain situated in the lower and back part 
of the head. Divided, into right and left lobe. Substance, similar 
to the brain. Its eminences are, two legs, a front and back worm- 
like process, and the tree of life. Its vessels, and use, the same as 
the brain. eo 
Oblong Marrow.—A marrow-like part lying upon the wedge pro- ~ 
_ cess of the hinder bone, formed by the connexion of the legs ofthe 
brain and hinder brain. Its eminences are, the bridge, pyramidal 
__ bodies, and olive-shaped bodies. Use, the same as the brain. — 
___ Spina Marrow.—A continuation of the oblong marrow, whi 
-seends in the back bone cavity, from the great occipital 
hird joint of the loins, in which course, it transmits. 
Mirty pair Of nerves. Its termination is in various nerves, whicl: 
form the horse-tail. Its membranes, the same as the brain. _ Its ar- 
tery, the front spinal. Use, to emit the thirty pair of spinal nerves. _ 
+ 
OF THE ACTION OF THE BRAIN, HINDER BRAIN, OBLONG MARKOWw, 
SPINAL MARROW. = 
‘The most important functions of an animal body are those of th 
_ brain. In order to explain these accurately, it is nece: 
tion.a few experiments which have been made upon. 
_ Upon dividing, compressing, or tying a ne ¥ uscles to — 
_ Witieh the nerve goes, become paralytic. If the nerve, thus divided. 
_ Compressed, or tied, had any particular sensation, that sensation no 
_ longer exists; but upon untying or removing the compression, its 
_ peculiar sense returns. a a 
If the brain, hinder brain, or oblong marrow, be irritated, dread- 
» “ful convulsions take place all over the body. Silat gh Ea 
_ . Wfany part of the brain compressed, that part of the body is 
prived of motion which has nerves from the compressed part. — 
__. From these phenomena, it is evident that the cause of every 
-Sation and motion in the animal body, arises from the brain a 
marrow, and that from these parts it is conv te 
part, through the | 
es 
