18. A Triphthong, or trigraph, is the union of three
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9. Consonants Classified: (1.) As to the nature ofthe sound represented, consonants may be classifiedas Subvocals and Aspirates. (2.) As to position oforgans in giving the sounds, they may be classified asMutes and Semivowels. (8.) As to the organs thatmainly operate to produce consonant sounds, theymay be classified as Labials, Linguals, Linguo-dentals,Linguo-nasals, Palato-nasals and Palatals.
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