75. _Give an example of a Cognate letter._
D is a cognate of T.

76. _What are Quiescent letters?_
Those that are silent.

77. _How many uses have Silent letters?_
Five.

78. _What are they?_
To modify vowels; to modify consonants; to determine
signification; to determine origin; and to distinguish
words of like signification.

79. _What are Explodents?_
Those letters whose sound cannot be prolonged.

80. _Name the Explodents._
B, D, G, J, P, Q, T, and K.

81. _What are the principle organs of speech?_
Lips, teeth, tongue, and palate.

82. _What is meant by Organical division of the consonants?_
Pertaining to those particular organs used in their pronunciation.

83. _Name the Organical divisions._
Labials, Dentals, Linguals, and Palatals.

84. _What are Labials?_