Looking-Glass, and put their Hand to my _Nose_, whereby they may be
sensible, that there comes forth thorough the _Nostrils_ a _Sounding
Breath_. When I teach them [_l._] I bid them to apply the _Tongue_ to
the _upper Teeth_; but to the _Cutters_, and to the _Dog-Teeth_ only,
that then they may emit a _Voice_ thro' the Mouth I make a Sign with
my Hand; but least, instead of [_l._] they should pronounce [_n._]
which comes to pass when the _Tongue_ doth so hinder the coming forth
of the _Voice_, that it returns to get out by the _Nostrils_;
therefore, till they are better accustomed, I gently compress the
_Nostrils_ with my Fingers.

The Letter [_r_] is the most difficult of all the rest, yet amongst
six Deaf Persons, which I have hitherto instructed, four of them
pronounce it with the greatest easiness; the other two cannot form it,
but in their Jaws; but I teach them, by moving the Hand one while to
the _Throat_, and another while to the _Mouth_, whereby they may, as
it were, feel the subsulting and interrupted Expulsion of the _Voice_;
also I bid them to look often in the Glass, to observe the tremulous
and fluctuating Motion of the _Tongue_; but no one can expect at the
first trial, the genuin Pronounciation of this Letter.

When the _Vowels_ and _Semi-vowels_ are well inculcated into them,
_the Consonants_ are learnt without any trouble almost, for they are a
_Simple and Mute Breath_, coming forth, either successively, or
suddenly, according to the various _Openings of the Mouth_, and only
with putting the Hand to the Mouth almost, they may all easily be
learned.

[_h_] is the most simple of all, nor is it any thing else but Air,
which is breathed out thicker, and more swiftly.