unison. Their knowledge, however, ended there. They knew neither
how to decompose sounds, nor to appreciate their relations.
[Footnote: We are aware that the contrary has been maintained; the
idea though cannot be supported. Had the ancients been acquainted
with harmony, their writings would have preserved some precise
notion on the matter, instead of a few obscure phrases, which may
be tortured to mean anything. Besides, we cannot follow the birth
and progress of harmony in the monuments left to us; this
obligation we owe to the Arabs, who made us a present of the
organ, which produces at one time many continuous sounds, and thus
created harmony.]

Tone was only reduced to system, and accords measured in the
fifteenth century. Only then it was used to sustain the voice and
to reinforce the expression of sentiments.

This discovery, made at so late a day, yet so natural, doubled the
hearing, and has shown the existence of two somewhat independent
faculties, one of which receives sound and the other appreciates
resonance.

The German Doctors say that persons sensible of harmony have one
sense more than others.

Of those persons to whom music is but a confused mass of sounds,
we may remark that almost all sing false. We are forced to think
that they have the auditory apparatus so made, as to receive but
brief and short undulation, or that the two ears not being on the
same diapason, the difference in length and sensibility of these
constituent parts, causes them to transmit to the brain only an