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of the FLUIDS of the HUMAN BODY 183 In respect lo AGE. In the faetus it is inodorous, insipid, and almost aqueous ; but as the infant gro S, it becomes more acrid and fetidand in otii age more particularly so. In re D to D Ris K: Ιt is secreted in greater quantity, and Os a more pale colour, frona coidand copious draughis. It becomes green froman infusion of Chinese lea, or the use of the pulp of Cassia. In respect to FooD: Frona eating the heads of Asparagus, or Olives, it contradis a peculiarsmeli: Froni the fruit of the Opuntia, it be- comes red; and frona fasting, turbid. Iuresen to MEDICINEA: Frona the exhibitionos Rhubarb root, it becomes yello ; and
frona Turpentine, a Violet colour.
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184 The CI EMICO-PHYSIOLOGICAL Docts ne strangurious. The climate induces ille sanae differenCe. 6. In respect of the ΜusCULAR MOTION of the DY': It is secreted more sparingly, and concentraled by motion; and is more copioussydiluled, and rendered more crude, by res. 7. In respect of the AFFEcTIO es of tbe ΜiND: Thusfright makes the urine pale. USE : The urine is an excremetitious fluid, like lixivium, by whicli the human body is not onlyliberaled froni the superfluous water; but also froni the superfluous salis, and animal earlli: andis defended from corruption. Lastly, The vis medicatrix naturae sonaetimes eliminates many morbid and acrid substances Withthe urine; as may be observed in severs, drop- sies, &C.
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THE mucus whicli lubricates the internat sur- face of the urethra. The SECRETORY ORGAN is composed of the muciparous glanta, situated under the internes membrane of the urethra. When abundant it IS Washed away Vith the urine. UsΞ : To defend the very sensibie sursace of the urethra, against the acridity of the urine.
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I. By this smegma the very sensible furface of the glans and prepuce is defenderi Ieast it beirritated during the efflux of urine, by iis acridity.
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THE aqueous vapoiar exhaling into the cavityof the tunica vaginalis, whicli involves the fes
The SECRETORY ORGAN is composed of the exhalent arteries, silualed on the internat furface of the iunica vaginalis, and external of the testicles. When abundant, it is absorbed by the 'scula oi
QUANT1TY : In a natural state, very litile; butvery great in hydrocele of the tunica Vaginalis.
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THE lactescent juice secreted by the prostate
d he SECRETORY ORGAN of this liquid is formed of the arteries of the i prostate gland, Whicli is notonly siluated under the necks of the urinary blad der; but Closely enabraces the. beginning of theurethra, ora iis inferior, laterat, and superior partS,
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The liquor of the prostate is sent through these ducts in a sussicient quantity into the urethra, during coition, or pollution ; and is evacuated through it, mitti the semen; in sonae meri it is also forced into ille urethra in a s mali quantity, duringan attempt to evacuate the alvine faeces, or lo
passe the urine. Lastly, it is the liquid whieli
QUALITY acidulous, coagulable by spirit os ine; herice it is albuminous. Co oui Whitim. alius the semen miXingwilli this juice, is rendered whiter; for iis naturalcolour in the vesiculae seminales is yellowissi. UsE It is miXed in the cavlty of the bulb of the urethra Uith the semen, imuing from the vesiculae seminales, in every coition and pollution Thus this part of the urethra is the broadest, and may be yet more dilated by iis own poWers.
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It is not yet ascertained, whether this liquor encreases and inspissites the volume of the semen, that it may be Uith more ease ejected ; or Whetherit is of any other use to the semen. In s me animais, as the Ram and Kid, this gland is Wanting.
THE MALE SEMEN.THE prolific liquor secreted in the testicles Of
men, and carried uiato the vesiculae seminales. The SECRETORY ORGAN of the semen iS Composed of the feminal canaliculi, or Very minute canais, Whicli constitute the fabric of the testicle, aud separate the semen froni the blood of the spermatic arteries. Frona these canaliculi it is carriedto ille Dididymis, and Dona therace, through thevas deferens, by a long and soW course inlo the ves culae feminales. In castrated animais, and in eunuchs, ille Vesiculae seminales are smali, and contra Sted; and alitile lymphalic liquor, but no semen, is sound in them. The semen is delained sor sonae time in thev si v seminales, and rendered thic ker frona the
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t a The CHEMICO-PHYSIOLOGICAL Doctrine continuat absorption os iis very thin pari, by the oscula of the lymphatic vesteis. In lasciolaus men, the semen is somelimes,
though rarely, propelled by nocturnal pollutioni rom the vesiculae seminales, through the bacula- toto ductue, whicli aris e frona the vesiculae seminales, persorate the urethra transversely, and open them-selves by narrow and Very nervous ostia at thesides of the caput gallinaginis inlo the urethra, and froni it lo fome distance. But in chase men the greatest part is again gradually absorbed froni the vesiculae seminales, through the lymphatic vesseis, and conciliales
the nostrils, yet not dis agreeable. The fame odouris observed in the roots of the orchis, julae ofchesnuis, and the autherae of many planis. Thesmeli of the semen os quadrupeds, When at heat, is sio penetrating as to vender their flesi fetid an luselesis, urites s castrated. Thus the stem of the