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ides thee imple Letters before enumerated, there are others commonly ued, which may be tiled Compound, both

The Compound Vowels are called commonly Dipthongs, or Tripthongs, or Bißona in Latin; but becaue the ignification of thoe words may as well agree with double Cononants, therefore others would have them tiled Bivocales, or ''Trivocales. Jacobus Matthias in his Treatie de Literis, and our learned Gataker'', in a particular Dicoure to this purpoe, do earnetly contend that there are no uch things as Dipthongs. Their principal Arguments depend upon this Suppoition, That (ɩ and ȣ) (which are neceary Ingredients to the framing of all uual Dipthongs) are Cononants, the ame with y and w. Others would have them to be of a middle nature, betwixt Vowels and Cononants; according to which Opinion I have already decribed them: From whence the Reaon is clear, why thee Vowels concur to the making of Dipthongs, becaue being the most contract of Vowels (as is alo the Vowel (ỿ) of which more hereafter) They do therefore approach very near to the nature of Litera clauæ, or Cononants; there being no Tranition amongt thee, either from one another,or to the other intermediate ounds, without uch a kind of motion amongt the Intruments of peech, by reaon of thee different Apertions, as doth omewhat reemble that kind of Colliion required to the framing of Cononants.

Several Languages ue everal kinds of thee Dipthongs, but how many there are in nature, may be eaily collected by the former diviion of Vowels (uppoing that to be according to nature) One of thee two Vowels ɩ or ȣ mut be an ingredient into all uual Dipthongs, either as

1. Thee Vowels ɩ and ȣ may be prepoed in this mixture before each of the other in which cae they will have the ame power that we commonly acribe to y and w, and will frame thee twelve Dipthongs.