122 



Science and Arts," Vol. 9, in 1850, Prof. Poole enounced 

 *A theory of perfect intonation in music, with a descrip- 

 tion of an organ made to obtain this result which had just 

 then been completed.' The organ was provided with 

 pedals and mechanism by which the larger number of 

 pipes necessary for perfect tuning could be played by the 

 common key-board. 



In that article it was maintained that Hhe prime seventh 

 with the ratio 4 : 7 was harmonious, admissible, and used 

 in music,' although this so far as he had seen was asserted 

 for the first time. The Jahrbuch of Liebig and Kopp, in 

 a discriminating review of Prof. Poole's article, specified 

 this declaration. 



In the same journal for July, 1867, Prof. Poole pub- 

 lished an article on "Perfect Harmony in Music," contain- 

 ing a description of a new '' Enharmonic key-board," 

 which was substantially the same as that of which a 

 drawing is given in this paper, though some improve- 

 ments and simplifications have since been made in its 

 details. 



In the same journal for May, 1878, an article by Prof. 

 Poole appeared on "Just intonation in music." 



The necessity of just intonation for instruction in har- 

 mony and vocalization is now fully recognized, and it is 

 to be hoped that those interested in the progress of musi- 

 cal science will interest themselves in the manufacture 

 and introduction of these perfected instruments. 



