374 An Account of Mr. Lislon's improved Orgartf 



37th volume, page 273*, after a perusal of the Rev. Mr. 

 Henry Liston's Manuscript, with which he favoured me 

 last summer. Since the period alluded to, Mr. IViUiam 

 ShiclJ, Mr. Thomas Greatorex, Mr. J. Davy, Mr. Samuel 

 IVestley, and a great number of other eminent musicians 

 have examined and fully tried the Organ, with 20 pipes in 

 each octave, (through three stops) yielding 60 sounds in 

 each octave, which was exhibited last summer at Messrs. 

 Flitrht and Robson's, in St. Martin's Lane, and the fout 

 professors above mentioned, since volutitarily transmitted 

 10 Mr. L. very ample testimonials of the practicability and 

 threat value of his improvements on the scale of Keyed In- 

 struments, and which are inserted in his preface. 



The interval between the severalMinor&Major consonances 

 / bD & D, F & «F, bG & G, bB & B, and bC & c \ 



\or2d&I[,4th&TV,3th&\f,7th&Vll,&8thScVlir/' 

 I'xr. L. denominates a L???2??mv (page 8) its value in each 

 of the above cases being T — H, or [ + 2g + 22, or 47S 

 -}- f + 4m, or the Semitone mcdiusf of M. Overend, 

 whose nomenclature I have always followed and wished to 

 roccmniend others to adopt, fof tlie sake of uniformity and 

 precision in troatina: on the Scale. The Interval between 



r bE & E and^bA & A j ^^_ ^ ^^„^ ^ q^.^^^ 



\or 3rd &: III, and 6th & VI J ' 



Livima, (p. 8) being t — H, or I + g 4- 2, or 36S + f + 

 3m, and is the Semitone minor of Overend, &c. 

 The Interval between 



r *D & bE, E &:bF, *G&bA, and *B & c "1 



tor «II&3rd, III&:b4th, *V&6th,&«VII &VIII/' 

 Mr. L. calls a Diesis (p. 10), being 2H — t, or 2^ -i- 2, or 



2,13 + 2m, and is the Enharmonic Diesis. 

 The Interval between 



f 4C 8c bD. «E & F, *F & bG, «A & bB, and B & bC "I 



|or*l&2nd,i'III&4th,lV&5lh,«Vll&7th,&VIII&8th / ' 



Mr. L. calls a Grave Diesis (p. 10), being 2H — T, or g or 



102 + m, and is the Minor Comma. 



„, , ,, / bF &»E, &bC & «B \ 



The Interval between |^^ ^ ^^^ ^ ^^ j„^ ^ g^,, ^ ^yjj | , 



being T 4- t — 3H, or L + 2, or 262 + f -f 2m, is not 

 particularly named by Mr. L. that I observe ; it is the Chro- 

 maUc Dies'-s of Dr. Callcott, and its ratio is \- 



! 3 (<.4 



* The 'specification and description, with a plate, of Mr. L.'s Patent Organ, 

 3ppe:ired in our ixxviith vol. p.32i5, and vol. xxxviii. p. 47.— Editor. 



+ Not the Semitone Mino: , or Liinmo, of my engraved Table of Intervals, 

 vol xxviii. Plaie V. 



In 



