The general theorem of Prop. V. is equally applicable to the
determination of the approximate place for any degree in this
scale, considering the numbers in the above table as those to be
substituted for _a_, _a′_, _b_, &c.; and _m_, _n_, and _p_, in the
first instance, as 49, -343 and 392, the uniform temperaments of
the Vths, IIIds, and 3ds, in the scale of equal semitones. Since,
however, the temperaments of the IIIds in this scale are sharp,
which would require the signs of the 3d and 4th terms in the
numerator of the general formula to be continually changed, it will
be rendered more convenient for practice, if they are changed at
first, so that it will stand thus:
x = (am - a′m′ - bn + b′n′ + cp - c′p′) /
(a + a′ + b + b′ + c + c′)
Three successive applications of this theorem to each degree in
the scale, in the manner described Prop. VI., will bring them very
near to the required position, as appears by the smallness of
the corrections in the 3d column below, where the results of the
several operations are exhibited at one view.
TABLE X.
+------+----------+----------+----------+
|Bases.| First | Second | Third |
| |Operation.|Operation.|Operation.|
+------+----------+----------+----------+
| B | -140 | -35 | -2 |
+------+----------+----------+----------+
| B♭ | +308 | +33 | -1 |
+------+----------+----------+----------+
| A | -8 | -23 | +2 |
+------+----------+----------+----------+
| G♯ | -257 | -22 | -2 |
+------+----------+----------+----------+
| G | +107 | +24 | -8 |
+------+----------+----------+----------+
| F♯ | -264 | -7 | 0 |
+------+----------+----------+----------+
| F | +238 | +40 | +6 |
+------+----------+----------+----------+
| E | -80 | -34 | -4 |
+------+----------+----------+----------+
| E♭ | +157 | +2 | -4 |
+------+----------+----------+----------+
| D | +58 | + 8 | 0 |
+------+----------+----------+----------+
| C♯ | -352 | -29 | -1 |
+------+----------+----------+----------+
| C | +176 | +29 | +4 |
+------+----------+----------+----------+
_Cor._ Hence we may deduce, in the same manner as in Prop. VII.,
the diatonic and chromatic intervals, the lengths of a string and
their vibrations in a second, and the temperaments and beats of
all the concords for the scale which results from the foregoing
computations. They may be seen in the two following tables:
TABLE XI.
_DIATONIC AND CHROMATIC INTERVALS._
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