CHAP. III.] 



STRINGED INSTRUMENTS. 



159 



At its other extremity, the rod is connected with a system of levers 

 which, by means of mechanism in the console, press all the strings of 

 the same name against nnts, which thus shorten them in the proportion 

 required by the laws of vibrations of strings in order that each note 

 may be sharpened throughout the instrument. The mechanism may 

 easily be understood by the help of figure 109. 



FIG. 110. Welsh harp. 



There are naturally seven pedals in the harp ; three on the side of 

 the left foot, used for sharpening the notes B, c, r>, and four on the 

 side of the. right foot, to sharpen the notes E, F, G, A. 1 



1 When the harp is played without pedals, the key is that of F (with one flat) 

 The pedal B raising all the Bi? notes a minor second, makes them B natural, and the 

 key then is C natural. 



