362 H.. Ward Poole on Just Intonation in Music. 
sounds, and to give to each the prominence desired. I shall 
describe one which embraces the three series of Prime chords, 
and, in addition, a Fourth, of the leading notes to the Thirds of 
eries IT, which are used in ornamental passages and the 
digitals will fall upon these lines, and will be understood by 
reference to the diagram, the mutual relation being the same in 
-Dragram.—Simply to show the relative position of the Digitals of the four 
Series ; their exact si ing as follows: 
@ = 6°5 inches + 24 (= 0-27). b= 0°9. 
: th. 
Wid Length. 
L. (C, D) 4a (and 3a) 4 
IL. tg d, e) 2a 3b 
IT. (C', E57) 2a 1d 
IV.( cH, a 26 
all parts of the boards. The digitals of each signature are ele- 
vated one-tenth of an inch as they go backward. The base of 
the digital C, with its 3d, e, and d#, (leading note to e,) and its 
seventh B are ,'; of an inch higher than F, a, g# and EB’, and 
the same distance lower than G, b, a and F. The white keys 
