S76 Rev. W. Scoresby on the Effect of' Mountain Echoes, <Sfc. 



of the cliff, or in the same direction as the echoes, so as to render 

 the auricular deception complete. The Eagle's Nest, indeed, seems 

 to be the seat of a fairy orchestra ; and the performance, modu- 

 lated by the occasional breeze, varied by the less distinct echoes, 

 and accompanied, at the interval of several seconds, by the Eolian 

 harmonies of the distant mountains, which become audible in 

 the more delicate cadences, altogether produce an effect as novel 

 and wonderful as it is diversified and enchanting. It is not to 

 be expected, indeed, that the whole of these accidental combina- 

 tions form regular concords ; yet the dissonances, from the liquid 

 nature of the tones, are far from being disagreeable, while they 

 often serve, like the discords introduced by skilful composers, to 

 heighten the effect of the succeeding harmonies. 



The enjoyment experienced at the " Station of Audience*" is 

 varied, by the bugleman repeating a part of his performance at 

 the elevated ground from whence the paterera is discharged. 

 The music elicited there is pleasing, but the deception being taken 

 away, owing to the performer's visibility to the audience, the in- 

 terest is found to be greatly diminished. 



In order to verify the conclusion to which I had cotne, in re- 

 spect to the cause of these musical phenomena, I changed situa- 

 tions with the bugleman, stationing him at the usual place of 

 audience, A, and descending myself beneath the bank, B, where 

 he was in the habit of playing. The result of his performance 

 was very similar to what it was in the former case. This, in- 

 deed, was fully anticipated, because the interval between the di- 

 rect sound and the echo was the same — the angles of incidence 

 and reflection similar — and the only difference observable was 

 presumed to arise from the direct sound being less distinctly heard, 

 perhaps, than under the former arrangement. 



Descrvptixm of' a new Instrument (proposed to he named a Mag- 

 netometer), for measuring the different degrees of magne- 

 tic intensity that are exhibited during the day, throughout 

 the year, and at various parts of the Globe. By Mark 

 Watt, Esq. M. W. S., &c. Communicated by the Author. 



Having observed that there was no instrument at present for 

 measuring correctly the various degrees of magnetic intensity, 



