_ that trembling Motion and Titillation, which they perceive in
their own _Throat_, whilst they of their own accord do give forth a
_Voice_; that therefore the Deaf may know, that I open my Mouth _to
emitt a Voice_; not simply to yawn, or to draw forth a _Mute Breath_,
I put their Hand to my _Throat_ that they may be made sensible of that
tremulous Motion, when I utter my _Voice;_ then I put the same Hand of
theirs to their own _Throat_, and command them to imitate me; nor am I
discouraged, if at the beginning their _Voice_ is harsh and difficult;
for in time it becomes more and more polite.
If I gain their _Voice_, which for the most part I do at the first
time, I soon learn them to pronounce _Vowels_, _viz._ I bid them so to
moderate the _opening of their Mouth_, whilst they do form a _Voice_
in their _Throat_, as I have said above, concerning the Formation of
the _Vowels_; but that they may do that the more easily, I hold a
_Looking-Glass_ to them, because they cannot from Sight alone imitate
those diverse Motions of the _Jaws_, of the _Tongue_, and of the
_Lips_, unless they had oftentimes tried it before a Looking-Glass.
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