The positions of the first-order combination-tones for
each of the six consonant triads are shown in
crotchets in the appended stave, the primaries being
indicated by minims. Each interval gives rise to its
own combination-tone, but, in the cases of the funda-
mental position and second inversion of the C-Major
triad, two combination-tones happen to coincide. The
reader will at once notice that in the Major group
no note extraneous to the harmony is brought in by
the combination-tones. In the Minor group this is
no longer the case. The fundamental position and
the first inversion of the triad both bring in an
A^ which is foreign to the harmony, and the second



198



MAJOR AND MINOR EFFECTS. [IX. § 104.
inversion involves an additional extraneous note, B^.
The position of these adventitious sounds is not such
as to produce dissonance, for which they are too fer
apart from each other and from the notes of the
triad ; but they cloud the transparency of the har-
mony and so give rise to effects characteristic of the
Minor mode.
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The imperfect nature of Minor compared with
Major triads comes out with peculiar distinctness on
the harmonium ; as indeed, from the powerfiil combi-
nation-tones of that instrument, we should naturally
have anticipated.
CHAPTER X.
ON PURE INTONATION AND TEMPERAMENT.
