( 520 ) 
ZXID 
Fig. 6. 
the pitch by turning the wheel of the pulley. In this manner the 
string was accurately tuned to Ut A (1023,9 v.s), so that it produced 
no beats in a resonator Ut t . 
Next an a string of the same thickness was put on a violin (fig. 7> 
The distance of a to b was again 32,5 cms. The violin was clamped 
on the table with some wooden blocks; in the neck of the violin a 
hole 0 was bored, through which the string was made to pass. As 
the Motion of the string on the usual ebony peg would have been 
too great, a metal peg was substituted which is represented in fig. 8. 
The string passes over the small metal 
wheel a. At p a cord was tied to the 
string which ran over a pulley and had 
a pan attached to it. The a string was 
now stretched by placing weights in the 
pan until the violin on bowing sounded 
Ut t accurately. It was found that a weight 
of 6 kilograms was required to do this, 
i. e. the same as with the zinc block. 
That the violin and the string on the zinc block gave the same note, 
i.e. without a difference of an octave, was confirmed not merely by 
the ear but also by the aid of resonators: the resonator Ut t responded 
to both notes, the resonator Ut 9 did not. If the note given by the 
violin had been an octave higher than that of the string on the zinc 
plate (i.e. Ut h ) the resonator Ut A would not have responded to the 
violin note. 
Fig. 8. 
