( 8?o ) 
ginning muft needs difcharge its Moiflure by its more 
narrow and deeper termina ion, into rhis receptacle; alfo 
it defcends diredly towards the Mouth, paflTmg through 
the Scull below the hole for the Ju- 
ofteegraphia Eie- gular Vein {mm) bctwixt the hole for 
rZijak. No. 327! the Carotid Artery, (ff) and that for 
Tab. 3. Fig. 3* the ArterU dura, matris {q q) whence 
deicending {nn) it is joynd with its 
Flefliy part, which difeharges it felf into the Mouth on 
each fide, behind the back part of the inner Teeth of 
the Upper Jaw. This fituation of the Aquedud makes 
it* plainly appear, that its Ufe is to receive the fuper- 
fluous Moifture from the Cavitas Tjmpani ; for befide 
the Glands above-mentioned, 6t for feparating fuch a 
quantity of Humidity as may lubrifie the Muicles, and 
facilitate both their Motion and that of the Oftcles ; 
the very Vapours that arife in fuch a Cavity as that 
of the Tqmpanum in this Animal, muft at laft be com 
verted into a Liquor, and that muft either again be re- 
ceiv’d into the Blood Veflels, or otherwife difeharg’d 
by fuch a Receptacle as this. Further if there be a 
neceflity for Glands in the Meatus Anditorius without 
the Tympanum, to feparate a certain Liquor, by which 
the acrimonious Particles of the Air are obtunded, and 
hindred from being offenfive to the Nervous Membrane 
of the Tympanum, ( which muft be of a moft acute 
Senfation) and for moiftning it, by which it the more 
eafily receives the Vibration of the Air ; fb fuch Glands 
as thefe feem to be moft requifite in the Cavitas Tym- 
pani for the Ufes above nam’d. And fince what fuper- 
abounds of this Moifture, cannot be dftcharg’d out* 
wardly as that of the Meatus, this Aquedueft ieems to 
be moft convenient for that purpofe. Some are of 
opinion that this Aquedurft is alfo aftifting to the Hear* 
mg, efpecially in Men j becaufe it is generally oblerv’d 
