by the opening of the Mouth or Nostrils, simply, and without any
smiting on the parts, which rather exciteth a whispering than a sound.
Hence is it, that Animals, whose Wind-pipe is cut beneath the Throat,
do indeed render a _Breathing_, but no _Voice_; for the Tube of the
Wind-pipe is too large, and too smooth, than that the Air can strike
upon it any where; and being thus reflected on its self, it can also
imprint a tremulous Motion on its neighbouring Bodies: This the
Physicians Pupils do know; who being about to dissect live Dogs, they
cut their Throats, that they may not be troubled with their barking:
For _Voice_ differs as much from a _Simple Breath_, as doth that
hoarse Sound, which we excite, by rubbing the tops of our Fingers hard
upon some Glass or Table, which is quite differing from that same
_soft whistling Sound_, which is heard when we lightly rub with the
Hand the same Glass or Table.

The _Voice_ therefore, as it is the _Voice_, is generated in the
_Cartilages of the Wind-pipe_, then afterwards is formed into such or
such _Letters_; but that it may become a lovely _Voice_, it's
requisite, that those Cartilages be _smooth_, and _lined with no
mucous Matter_, else the _Voice_ will become Hoarse, and sometimes be
utterly lost, viz. when they have lost their Springy power.

For _Pipes_; and other _Wind-Instruments_ do most notably explain to
us the nature of the _Voice_; for in them we see a certain _Voice_ or
_Sound_ to be generated out of Simple Air, whilst it is as it were,
rent in pieces, and forced into a tremulous Motion: Now, that in these
Instruments there is a little Tongue; or which is instead of a Tongue,
the same in a Man is the _Epiglott_, or Cover of the _Wind-pipe_, and
the _Uvula_, or Pallate of the Mouth; but the rest of the _Cartilages_
of the _Throat_, besides that, they contribute much to the making of