New Mode of equally Tempering the Musical Scale. 65 



distilled water, or on the side of the positive pole, without 

 any disena;ao-ement of gas having been perceived in the so- 

 lution of nitrate of soda, or from the negative pole. 



But the poles having been changed, so as to make the di- 

 stilled water communicate with the negative pole, and the 

 solution of nitrate of soda with the positive pole, the energy 

 of the pile became instantly very sensible in the two tubes ; 

 and there were soon established, towards both poles, consi- 

 derable currents of bubbles, and continuing nearly 200 hours 

 quite visible through the bell glass which covered the ap- 

 paratus. 



M. Riffault has also subjected to experiment the solution 

 of nitrate of soda in both tubes. He still continues these 

 two experiments, and attends to them with great care. He 

 hof>es they will present some interesting results, with which 

 he will make the Galvanic Society acquainted. 



Vni. Oa a new Mode of equalhj Tempering the Musical 

 Scale. By Mr. John Farey. 



To Mr. Tilloch. 



FSIR, 

 OR the information of such of your musical readers as 

 may be advocates for the isotonic or equal temperament scale, 

 and also for enabling those who prefer other systems, to make 

 deliberate and just comparisons of that system in practice, 

 with their own favourite systems, I embrace the present op- 

 portunity of stating, that in pursuing the inquiry which 

 (vol. xxvii. p. 204, of your Magazine,) I reconmiended to 

 musicians, and beg here still further to recommend, into 

 the many different wolves which can arise by comparing the 

 S'iven conchords with each other, in all their possible com- 

 binations, I discoveredjon lhel2lh uk. — that 5 ime fourths, 

 when compared with 3 true fifths and a true major third, 

 or !,4ths — 3V — III, give a wolf or diflcrcnce, which 

 agrees with the proper flattening of the ffihs in equal tem- 

 perament, to a surprising degree of exactness ; differing there- 

 from no more than 3,21 14 in the logarithms of eleven places 

 Vol. 28. No. 109. Ju7ie 1807. F. "f 



