520 Prof. A. M. Mayer's Researches in Acoustics, 



elements by means of resonators. We have just seen that the 

 Ut 3 fork could not vibrate the Ut 4 fork when both forks were 

 on their cases and when Ut 3 was flattened by 2 beats per 

 second, and also that a departure of 4 beats per second pre- 

 vented Ut 3 from setting Ut 4 in sympathetic vibration when 

 both forks were off their resonant cases and with their prongs 

 close and parallel to each other. But when the Ut 3 fork was 

 loaded so that it made from 15 to 20 beats with its proper tone, 

 it caused the serrations of the Ut 3 resonator to appear accom- 

 panied by the serrations of its octave. The Mi 3 fork, although 

 it developed the serrations belonging to its own pitch when 

 brought opposite the Ut 3 resonator, yet did not, as might have 

 been expected, develop its own tone and the octave when 

 brought near the mouth of the Ut 4 resonator. It is probably 

 not necessary to add that the above effects of simultaneously 



Fig. 3. 



Curve of a musical note, being the resultant of the simple vibrations of 

 its first six harmonics. 



