The various sounds of the several vowels and even of the same vowel are caused by the different shapes which the mouth assumes. These changes in its cavity produce, also, the two sounds that unite in each of the compounds, ou, oi, ew, and in the alphabetic i and o.

1. 2.
Vocal Consonants. Aspirates.
b………………p
d………………t
g………………k
—————————-h
j………………ch
l—————————
m—————————
n—————————
r—————————
th……………..th
(in thine) (in thin)
v………………f
w—————————
y—————————
z (in zone)……s
z (in azure)…..sh

The consonants in column 1 represent the sounds made by the obstructed voice; those in column 2, except h (which represents a mere forcible breathing), represent those made by the obstructed breath.

The letters are mostly in pairs. Now note that the tongue, teeth, lips, and palate are placed in the same relative position to make the sounds of both letters in any pair. The difference in the sounds of the letters of any pair is simply this: there is voice in the sounds of the letters in column 1, and only whisper in those of column 2. Give the sound of any letter in column 1, as b, g, v, and the last or vanishing part of it is the sound of the other letter of the pair.

TO THE TEACHER.—Write these letters on the board, as above, and drill the pupils on the sounds till they can see and make these distinctions. Drill them on the vowels also.

In closing this talk with you, we wish to emphasize one point brought before you. Here is a pencil, a real thing; we carry in memory a picture of the pencil, which we call an idea; and there are the two words naming this idea, the spoken and the written. Learn to distinguish clearly these four things.

TO THE TEACHER.—In reviewing these three Lessons, put particular emphasis on Lesson 2.

* * * * *

LESSON 4.
ANALYSIS AND THE DIAGRAM.