CHAP. II.] 



MUSICAL INSTRUMENTS. 



127 



water into each glass, harmonies can be produced as exact as may 

 be required. 



It must be understood that most of the instruments of this kind 

 are seldom used : they are mere objects of curiosity, interesting as 

 applications of the laws of musical acoustics. 



FIG. 81. Japanese bell at Kioto. 



Carillons, or chimes of churches and belfries, are collections of the 

 same kind as those just described; they are formed of bells struck 

 by hammers, the hammers being moved either automatically by 

 the bolts of a cylinder, or directly by the keys of a finger-board, like 

 that of an organ or piano, or, lastly, as in the primitive carillons, by 

 a system of pedals worked' by the hands and feet. The key-board 



