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AN extremoly subtile liquid, contained in the
Very minute canals Whicli forna the medulla os the cerebrum, cerebellum, medulla oblongata, medulla spinalis, and nerVCS. The SECRETINO ORGAN is composed of the extremities of the arteries Whicli sorm the vascular cortex of the cerebrum, Cerebelluin, and medulla spinalis. Lut ille medulla spinalis is internali ' Vascular,
and externat medullary ; that the spinal merves may not have to passe through the cortical subia
The nervous liquid appears lo exhale frona theextremities of the nerves. The lassitude and debilily of mocles frona too great exercisse, and theduinesse of the sensorial organsistom excessive use, would seem to prove this.
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It has no SMΕLL Dor TASTE; for lite cerebri ne medulla is inspid and inodorous. Nor has it a ny
have been delected. Its MOBIL1 TY is STUPENDous, si1 in tes s litana moment, With the consent of the mind, it is conveycd frona the cerebrum to the muscies, like the eleetric malter. Whether the nervous fluid be carried, si omlhe organ of sense in the sensorial nerves to the cerebrum, and frona thence in the molo; γ nerves
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sici in in the present day doubis P
l atra of opinion that the nervotis ii id is an elem ni sui generis,' hicli exists and is producedin the nerves only; heiace, like other elemenis, Itis a thing unknown, and only to be known by iis effect
' Tith properties peculiar to iis eis.
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The CHEMICO PHYSIOLOGICAL Doctrine
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THE VAPOUR OF THE VENTRICLES OF THE BRAIN.
THE thin vapotir contained in the cavlty of the ventricies of the cerebrum. The S cRETORY ORGAN is constituted by the exhaling arteries of the choroid plexus of the ventricies os the cerebrum. The super ous Va-pour appears lo be absorbed by the osci .. of thelymphalics of the sanae plexus: sor lymphatic
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6o The CHEMICO-PHYSIOLOGICAL Doctrinevesseis were lately seen on the corpora striata os the cerebrum os a CO .
I. It impedes the concretini of the ventricles of the cerebrUm.
2. It penetrates between ille sibi es of the cere-brine medulla, and thus preserves it Iose and mois.
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super ous Vapour appears to be absorbed by the oscula of lymphatic Velleis, the presence of whichthe Bb mohsan glands of the dura mater proVe.
The QUANTiTY in the sciund and living bodyis invisibie, but in hydrocephalus internus im
Iis QuΑLiTY is the fame as the vapour of the ventricies of the brain.
USE : It prevenis the concretion os the pia mater and cerebrum Mith the dura mater, and preserves ille cortex of the cerebrum mois and An.
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THE VAPOUR OF THE SPECUS VERTEBRALIS.
I E ihin vapour in the specus vertebralis belween the dura and pia mater sui rounding the spinal marro .
The SΕcpEToRY ORGAN is composed of the exhaling arteries of the pia and dura mater, in- Vesting the specus and medulla spinalis. The supersaous Vapour appears to be absorbed by the oscula of the absorbent vesteis. The QuΑNT1TY in a living and healthy man is invisibie, but very great in hydrorachitis and spina bifida.
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I HE mucus Whlali lubricates the sopium andeonchae of the nosse. 1 he Src ETORY OBGAN is formed by the copiae lucisarae, stuateo in the pituita membrane
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lining the septuna and conchae os ille nostriis. There is naixed with this Iruicus while in thecavlty of the nos i. A rofrid realer, Whicli flows through three meatuses 1 rqm the frontal, sphaenoidat, ethmoidaland maxillary sinuses, into the cavlty of the nostriis. A membrane not fungous like thepituitary membrane, but very vascular and tender, Mithout muciparous cryptae, lines the parietes of these sinus es. a. The Lachrymal humour, Whicli runs froin thei lachrymal sac, through the nasal canals Under the inferior concha nafalis, into the posterior meatus of the nostriis.
Athe nostriis is occasionalty ejected by sternutation. or Wiped froni the anterior foramina osthenostritu or falling into the fauces through the posterior soramina, is spit out by the moum. it has no SMEM . TASTE: FatuOuS.