a] 
On an Organ for perfect Harmony. 275 
organ, and by which he has been able to avoid that im- 
practicable divergency of tune which Mr. Maxwell’s scale 
for the organ contains. It is thus that Mr. L, tunes, up- 
wards: 
v Vv Tll WM RS Vv a" ul Vv Vv 
C GD: then C E A B «F 4«C: then E xG xD 
4th 
vA xE: and «GB. And downwards, 
a Eb Iv: tl mn v v 
C F bB: andthenC bA bE bD 6G bC. 
4th 
Instead of which, Mr. Maxwell proposed a series of dia~ 
tonic scales, proceeding always by perfect major fifths, and 
therefore his scale, though containing 44 sounds in the oc- 
tave, could not furnish a great many intervals wanted by 
the musician, or admit of the modulations in daily use. 
Mr. L. on the contrary, by proceeding as above, and ex- 
tending the number of notes to 24, or as inany more as may 
be desired, produces his notes all in true musical relation 
to one fundamental bass note C; and as within such a 
scale, there are many intervals falee. by a comma, he enables 
the performer in every instance to correct the error, by 
means of his pedals: and I am assured, that the use of 
these pedals has been found so easy and simple, as to occa- 
sion little difficulty even at first trial, and that a day or two 
has always sufficed, to make performers of ordinary capa- 
city, perfectly acquainted with thein. 
It is very easy to apply the above tuning scale to my 
calculations of the notes; thus the V® G is fixed by the 
nature of thisnotation at 7 17 33, this added to itself, 
gives 14 34 26, for d, in the octave above, therefore de- 
duct the octave 12 29 22 (which the nature of this nota- 
tion has fixed), and we have D=2@ 5 4: E the III*is 
fixed at 4 9 7 (by the nature of the scale), to which we 
add a 4%, 5 12 9g, and we have A=Q 21 16; and so 
for any other notes in this table, or for more extended scales 
wherein bf and the necessary double flats and sharps are 
introduced, as can with facility be done by the inventor, on 
organs for which he may be honoured with orders. I can- 
not conclude without earnestly calling the attention of all 
lovers of good harmony to this improvement, and wishing 
every success to the very able and ingenious inventor. 
I remain, su, 
Your obedient servant, 
12, Upper Crown street, Westminster, Joun Farrer. 
April 12, 1821, 
S2 The 
