12 H. W. Poole on Perfect Harmony, etc. 
Fig. 2.—A portion or THE Ennarmonic Key-BoarD, SHOWING THE RELATIVE PoOsI- 
TION OF THE FINGER-KEYS Mebar GIVE THE TRIPLE AND DovuBLE hain ScaLEs 
IN EVERY KEY OR SIGNATURE, zane Pt ON ANY WHITE KEY.—Scale of one-half, : 
d black d keys—perfect sevenths 
—ty wetios! lines ; a blue spp denaae thirds in Soe min Bice Boe Sestuenbel lines; the 
yellow keys—domin ant sevenths in the minor mode—by white stippled with black. 4 
ay 
A ; 
Do 
Fig. 8—Sxcrion a AB, on THRovcH THE —— QUARTER OF ANY KEY-NOTE, 
EXPOSING OTES OF THAT KEY BOTH IN THE Major anp MINOR MODES. 
et as a 
8:9 9:10 15:16 8:9 9:10 8:9 15:16 
DOUBLE DIATONIC SCALE. 
Vil Il Ill 
a I ar a a ie ee 
8:9 9:10 15:16 §:9 9:10 a6: 31” 7:8 
Souwps Given By THE anove FINGER-KEYs IN 
A a’ | 
nj C ya 
q 2” 
cual Go 
ab 
| ol 
