. The London, Edinburgh and Dublin philosophical magazine and journal of science . ks, and metalorgan-pipes. Their cost is trifling. The notes should be perfectly pure tones, according to thetheory, having regard only to disturbances of the smallestorder: but practically, in all tones of this supposed pure cha-racter small quantities of harmonics do exist; and I have longmaintained that they always must exist in sensible intensity,on account of the transforming power of the air, or, in other * Pogg. Ann. clvii. p. 177; Phil. Mag. [V.] i. pp. 417, 511. See also1 Proceedings of Musical Associati
. The London, Edinburgh and Dublin philosophical magazine and journal of science . ks, and metalorgan-pipes. Their cost is trifling. The notes should be perfectly pure tones, according to thetheory, having regard only to disturbances of the smallestorder: but practically, in all tones of this supposed pure cha-racter small quantities of harmonics do exist; and I have longmaintained that they always must exist in sensible intensity,on account of the transforming power of the air, or, in other * Pogg. Ann. clvii. p. 177; Phil. Mag. [V.] i. pp. 417, 511. See also1 Proceedings of Musical Association/ 1878-79, Spottiswoode On Beatsand Combination-tones. 292 Mr. R. H. M. Bosanquet on the Present words, because the aerial disturbances of higher orders arenever small enough to bo entirely neglected*. The lower har-monies can be accordingly detected in the notes of theseresonators by the use of analyzing resonators of proper pitch,whose interiors communicate with the ear. The twelfth canbe detected by an experienced ear, in some cases, without theuse of analyzing Section of speaking resonator, with organ-pipe mouthpiece, siphon withstop, and reservoir for tuning; also flexible tube for putting into theear when used as an analyzing resonator. This tube can be also used forgas-flame experiments. With a rough experimental bellows furnishing an unsteadywind, and these resonators, I have been able to repeat some ofthe less difficult of the experiments of Konig. The only statement made by Konig as to the notes of whichthe beats consist, is in Phil. Mag. fifth series, i. p. 425, wherehe says that the two notes of a harmonic interval appear alter-nately, but that the observation is difficult in the case of theoctave. .Now in all cases where beats exist, it is possible, bythe use of analyzing resonators communicating with the ear,to determine in the manner pointed out by Helmholtz the dif-ferent notes which vary in intensity, as well as any that donot vary in intensity.
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