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

[g] or ch. is sharper than [h] which I teach thus, when I shew to my Deaf Patients the posture of the Tongue in a Looking-Glass, and give them to feel the expiring Breath; it is so in like manner with [s] and [f] insomuch, as nothing is more easie than they, and which may most easily be learned by the fore-going Description.

I can teach a Deaf Man, (though he were blind) the Explosive Consonants; for if I cause him to feel the Breath discharged upon him, he would necessarily pronounce one of the three; for I bid him to look simply on my Mouth and Tongue, and then having put his Hand to my Mouth, I pronounce either [k.] or [b.] [p.] or [d.] [t.] and command him to do the like.

(x.) and (z.) are pronounced no otherwise than is (ks.) or (gs.) (when (g) is an Explosive Consonant) and (ts.) wherefore I shall add nothing concerning them.

Deaf Persons are to be diligently accustomed to pronounce these Semi-vowels, n. ng. l. r. also the following Consonants; h. g. k. t. with some kind of opening the Mouth, else they may joyn them sometimes with certain Vowels, not without a notable yawning, & a discordant noise.  Now in general, Winter-time is fitter almost for to instruct the Deaf, because then they see the Breath coming forth from the Mouth, whilst Pronounciation is in doing.

When therefore I taught any Deaf Person to pronounce the Letters hitherto enumerated, and that one by one, I taught him so to utter two or three of the easiest, that there should be interstice between them; as for example, ab. am. da. fa. ef. &c. so that they might be accustomed to pronounce the Letters successively; then by degrees I use them to the more difficult Combinations, mutually mixing Vowels, Semi-vowels and Consonants, and thus with little trouble they learn to read; but if when they have read any thing, I bid them look upon my Mouth, and to repeat the same after it hath been pronounced by me; for thus they become by degrees to be accustomed to imitate the humane Voice, only by looking on; but I am unwilling to tire them out with this labour, troublesome enough, until they have profited much, because they may be frighted with it.

In the mean time we must endeavour diligently; that when one Consonant follows another Consonant, as ps. kt. ks. sch. &c. or a Semi-vowel, as ls. lk. md. &c. that they do immediately joyn them in Pronounciation, least some (i) or (e) be heard between them, which unless it be cautiously avoided, often happens.