Mr. Wheatstone on Resonance, 



179 



will be heard ; but on removing the pasteboard, an additional deep, 

 rich tone is produced by the resonance of the column of air within 

 the tube. 



The instrument from which the annexed drawing was taken is at 

 present in the museum of the Honourable East India Company; 

 and there is another specimen in the possession of Lady Raffles. 



THE GENDER. 

 Musical Instrument of Java. 



The same principle appears to have been employed, in more rude 

 forms, in the construction of several Asiatic and African musical 

 instruments ; but I am unaware of any instrument having yet been 

 manufactured in Europe, in which the unisonant resonances of 

 columns of air have been made available as a means of augmenting 

 the intensity of sounds. I shall shortly publish an account of the 

 several modes I have myself devised, and practically employed, for 

 advantageously applying this principle. 



J 6. In the experiments I have hitherto detailed, the recipro- 

 cated vibrations have always been isochronous with those of the 



N 2 . 



