toi The Anatomy ofaHOKSE. 



conftant Supplies, as there are continually fome Dregs and 

 Excrements exhaling through them. 



Of I r fhl "^^^ ^^'^ ^^^^ appear ftill more evident, 



"IranftiratiQn. "^^^^ ^^ conflder, befides the Effluvia that 

 go off infenfibly in this Manner through the 

 Pores and Tnterftices of the Body, that moft of the Glands 

 are continually feparating fome Part of the excrementitious 

 Matter of the Blood ; though all that is difcharged by the 

 Mouth and Nofe, by Urine and Dung, and by Sweat, or 

 any other fenlible Way whatfoever, does not near amount 

 to the Difcharge that is made through the Pores by infen- 

 fible Tranfpiration. This is fo palpable a Truth, and has 

 been fo well proved by the Experiments of San£iorius^ that 

 there needs be nothing farther faid about it ; and therefore 

 -we may conclude, that fince the Bodies of all Animals are 

 thus eompounded, and made up of Matter which is full of 

 Pores and Interflices, and maintained by Juices, which are 

 again capable of being diffipated and waited through thofe 

 Pores, there muft be continual Supplies of Food to maintain 

 thofe Bodies in an uniform State. 



Now it is plain, that all Bodies fufFer a DiiTipation and 

 Walte, if the Quantity of the Aliment • be abated : For in 

 fuch a Cafe we obferve any Creature grow lean and emaci- 

 ate. It is alfo evident, that all fuch luffer by Exercife, by 

 hard Labour, by Want of Reft, when it is the ftated Time 

 of Sleep; and by many other Ways, not necellary to be 

 mentioned. And therefore all Creatures are under an in- 

 difpenfable Necefiity both of Feeding, and taking fuitable 

 Reft, to rhake up the Wafte and Decays of Nature ; for a^ 

 often as there is a great Diflipation by Labour, or by any 

 other Way, the fmall Fibrillcs are thereby abraded and 

 wore by the quick Motion the Blood and Spirits were in 

 during that Exercife ; or even, if the Body was not in 

 Exercife, it will fufFer by the conftant Adivity of the Spi- 

 rits themfelves ; fo that a ftated Time of Reft muft alfo be 

 neceflary for all Bodies, as well as Food. For when the 

 Body is at Reft, the Spirits are, as it were, lulFd and laid 

 afleep ; fo that the Blood acquires, during that Time, a 

 more uniform and gentle Motion, and is more equally di- 

 ftributed into all Parts, and thereby fills up all the vacant 

 Spaces that arc made during the Time of Exercife, i5c. 



But it may be expeded, before I put an End to thisDif- 

 courfe, that I fhould fay fomewhat more particularly con- 

 cerning Secretion i but I fhall c^nly obkrve in general, tha^ 



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