214 H. W. Poole on Perfect Musical Intonation. 
there is scarcely a point of resemblance, either in its internal struc- 
ture or its management by the player. We cannot be expected 
here to give a description of our machinery, further than is nec- 
essary to understand the method of playing it, as it would require 
drawings to make it intelligible; and besides, we have already, 
we fear, exhausted the patience of our readers. On our organ, a 
single pedal will bring on an entire scale, extending through every 
set of pipes in the instrument, and the operation of the pedals 1s 
the same in every key. On Mr. Liston’s organ, different keys re- 
quired different combinations of pedals, with different degrees of 
difficulty. All the notes of some diatonic scales could not be 
brought on together by any combination of pedals, as for in- 
stance, in the scale of G, the organist could not obtain its second, 
A?, and its sixth, E?, at the same time ; for when A* was brought 
on, E? always came with it, and A? always accompanied E?. 
51. The practicability, therefore, of building an organ which 
will give its chords in perfect tune, and can be easily managed for 
all music that is proper for the services of the church, is no longer 
a matter of speculation and doubt. he organ we have spoken 
of, has been in constant use for nine months, and has kept in per- 
fect order. Good singers, whose ears have not been accustomed 
to a tempered accompaniment, agree with it perfectly, giving read- 
ily and naturally, all the intervals necessary to Perfect Intonation. 
