i68 M E M O I R S ^/-//S^ 
Frcenum^ or ligament' of the tongue, and this is done by the 
Mufulus Mylo-hyoidcus. When the aliment is thus forced into 
the Fauces, or upper part of the gullet, at the lame time the 
GarirareoUy toi^ether with the Uvuia^ are drawn upwards and 
backwards by rlie Miifciili Spbtfnoftapbylini j by which means any 
part of the aliment is hindred from alcending into the Foramifia 
Narium ; and the Fauces by the Mufculns 'Pterygopharyngeus 
zx\^ Oefopha^eus, are contracted ^ whereby the aliment is not 
only comprcfled into the gullet, but the matter feparated from 
the blood by the glands of the Fauces, efpecially of thofe large 
ones called "/"o;{////^, is forced out of their cells or excretory 
duils to join with it in its delcenr into the llomach, by the gullet, 
thro' which latter it pafles, by the action of its mulcular fibres. 
The aliment, thus impregnated with Saliva in maftication and 
deglutition, being received into the flomach, it there meets with 
a juice leparated from the blood by the glands of that part, whofe 
excretory du61:s open into the cavity of the ftomach ; by the com- 
mixture of thefe liquors, whether of the Saliva or juice of the 
ftomach, a proper jVIetiflruum is compoied, by which the parts 
of the aliment are Hill more and more divided by its infinuating 
into their pores, by which the air, before imprifoned in their lels 
divided parts, is not only more diientangled, but by the natural 
heat, it muft neceffarily fuffer fuch a rarefa6tion, as that thereby 
the whole ftomach becomes Itill more and more diftended. Hence 
it is that we have leis appetite Ibme time after eating than we had 
immediately upon it^ hence alio anie thole frequent eructations from 
divers aliments, as oldpeale, cabbage, and divers other vegetables 
we frequently eat, all which prove very prejudicial tc depraved ap- 
petites and weak ftomachs^ at the lame time, when this intume- 
Icence and agitation of the matter is made in the ftomach^ the 
contents of the neighbouring excretory duels, viz, the bile in the 
gall bladder, and du(5ts of the liver, and the pancreatic juice in the 
^iDuEtus pavcreaticus are compreiTed into the Tiuodemimy thro' the 
diltenlion of the ftomach itlelf^ the refluent blood of the ftomach, 
at that inftant, being, in fome meai'ure, retarded, whereby the 
mulcular fibres are "more liable to be contracted. Nor can we 
conceive how the liquor of the ftomach, after uniting with the 
ipittle and aliment, ftiould be ftill lb plentifully excreted from 
the glands of that part, as to irritate its internal membrane, and 
excite its mulcular fibres to contrail, fince the mufclcs of the 
Jibdovien would, in like manner as in vomiting, be drawn into a 
conlent of cooperating, and the aliment would be forcibly re- 
je£led by the mouth 3" be fides, iliould the liquor of the ftomach 
prove 
