[ 17 ] 

 V. On the Derivation of the Scale, &c. 



To Mr. Tilloch. 



Sir, JDr. Crotch has recently published a quartoTreatise 

 on Musical Composition, of which the last thirteen pages 

 (troin p. 124 to the end) treat on "the derivation of the 

 scale, tuning, temperament, the monochord, &c." He 

 remarks thaT " no two major keys at all related to each 

 othf i con exist, on the same keyed instrument, perfectly in 

 tunc:" and adds that in a leciur, on this siibj.ct, he caused 

 the keys or -E major wiih four sharps, and E flat major 

 with three flats, to be tuucd " perfectly" (perfect) on the 

 same pia.io-forte : namely, first the triads E, G«, B — A, 

 C*, E— tj, D*, F*; and then, having two notes G* and 

 D*, already tuned, which would serve for Ab and Eb, C 

 was added to them; and lastly, the triads of Eb, G, Bb — 

 and Bb, D, F. 



The following is a T^ble of Bgits of the Consonances in 

 \", tuned according; to the Doctor's directions. 



Dr. C. is one of the great number of miJsicians who have 

 declared a preference for the ecjuul temperament. And 

 indeed, if we had no httttr unequal temperament than this, 

 I think there would be no disagreement of opinion about 

 them. It is strange that the Doctor should write in this 

 manner: the " small interval called a comma is about as 80 

 to 8 1. "-p. 132. 



June 15, 1812. A. 



Vol. 40. No. 171. July 1812. 



B 



VI. De- 



