They are divided into _vowels_, _sub-vowels_, and
_aspirates_; or, as classified by Dr. Rush in his "Philosophy of the
Human Voice," into _tonics_, _sub-tonics_, and _atonics_.

There are fifteen _vowels_, fourteen _sub-vowels_, and nine
_aspirates_.

_Table of the Elements._

VOWELS

A as heard in _a_le, f_a_te, m_a_y.
A " " " _a_rm, f_a_rm, h_a_rm.
A " " " _a_ll, f_a_ll, _o_rb.
A " " " _a_n, ide_a_, p_a_n.
E " " " _e_asy, im_i_tate, m_e_.
E " " " _e_nd, l_e_t, m_e_nd.
I " " " _i_sle, _i_ce, fl_y_, m_i_ne.
I " " " _i_n, p_i_n, _E_ngland.
O " " " _o_ld, m_o_re, _o_ats.
O " " " _oo_se, l_o_se, t_o_, f_oo_l
O " " " _o_n, l_o_ck, n_o_t.
U " " " m_ew_, f_ew_, t_u_be, p_u_pil.
U " " " _u_p, t_u_b, h_e_r, h_u_rt.
U " " " f_u_ll, p_u_ll, w_o_lf.
OU " " " _ou_r, fl_ou_r, p_ow_er.

SUB-VOWELS.