O.V TEMPERAMENT. 181 



the borrowed, or chromatic sharp tone, in every other, thus, 

 the 7th in the key of G is the sharpened fourth, or F sharp 

 in the key of C, and so in relation to every other chromatic 

 sharp tone. 



The white digital is to every coloured digital as its chromatic 

 fiat tone, thus, the fourth in the key of F is B fe, or the 

 flat seventh in the key of C, so in relation to every other 

 chromatic flat tone. In this way all chromatic sharp and 

 flat tones are perfectly and conveniently supplied without 

 encumbering the fingerboard with any extra digitals, such as 

 the black digitals on the ordinary keyboard, the scale in each 

 key borrowing from those related to it every possible chromatic 

 tone in its own place, and in perfect intonation. 



The tuning is remarkably easy, and as simple as it is 

 perfect. 



While all the major keys upon the fingerboard, according to 

 its range, have relative minors, the following, 'B k, 'F, 'C, 'G, 

 X D, A, E, B, F | C ft G f , and D #, can all be played both as 

 major and as perfect tonic minors. 



These secondary keys are more than appears at the first 

 inspection of the fingerboard. A series of round digitals 

 placed upon the white, and a comma higher, additional to 

 those placed upon the coloured digitals, would supply the 

 scale in every form the most exacting musician could desire, 

 but it is a question if such extreme extensions are either 

 necessary or in true key-relationship and whether simplicity 

 in the fingerboard is not more to be desired than any multi- 

 plication of keys which involve complexity and confusion. 



NOTE. A full description of the voice harmonium may be found 

 in the specification for patent. The principles upon which it is con- 

 structed and tuned will be found fully stated in Music in Common 

 Things, Parts I. and II., published by Messrs. William Collins, Sons, 

 and Co., Glasgow, and Bridewell Place, New Bridge Street, London, 

 and the Tonic Sol Ea Agency, 8 Warwick Lane, London, E.G. 



