762 PROFESSOR FLEEMING JENKIN AND J. A. EWING ON THE 
This summary, however, does not include one phenomenon, which is not so 
obvious as those already mentioned, and to which we are disposed to attach 
some importance. There is evidence that in certain cases the high partials, as 
they successively appear, do so somewhat abruptly, while, at the same time, the 
partial immediately lower, which had previously been the highest prominent 
partial, sometimes suffers a rather abrupt diminution in strength. A good 
instance of this is given by voice 6, Table V., where, in examples 53, 54, 
and 55 (or B,, A, and G) the fourth partial is by far the most prominent, 
but in example 56, which is only one tone lower, the fourth partial has 
sunk into comparative insignificance, and the fifth partial has become remark- 
ably strong. The suddenness of this change is well brought out by Table 
VIII., which gives the amplitude of the fourth and fifth partials of the o’s sung 
by voice 6. 








TABLE VIII. 
Pitch of Prime. Bb. | A. | G. F. 
Amplitude of IV.th Partial, . : 75 80 45 8 
Amplitude of V.th Partial 2.) 9 12 9 34 

Other, though perhaps less striking instances of the same sort of action, 
are to be found in other parts of the table. Table IX. gives the ampli- 
tudes of the III.d partial, and Table X. those of the IV.th partial, in os 
sung by: voices 1, 3, and 5, with the pitch of the partial at the top. 
It will be observed that there is a somewhat sudden rise at the places 
marked with a star, thus*. There is much less of this in voice 1 than in 
the other two. 
TABLE IX. (Tuirp PaRTIALs.) 








Pitch of Third Partial. | ¢” | b” | bb’ | a” | g#| g | rH" lf | et eb” | id” | cet | et | Ot) Opt line | 9 
Amplitudein Voice 1,} 7) 7 |...) 5 |... | 15 | 15'| 13'| 95 |... | 271... | 45 | 73 | 2.) {eo 
2 sre 3 ite ee 4 2 11*| 35 38 33 
ES pe bal Gales 6 5) 2 1 WSs 10 3 *58 | 64 56 | 








