122 Dr. Young's Experiments and Inquiries 



by a swell, than it can possibly be by a sudden impression of the 

 blast. It is proposed, at a future time, to ascertain by experiment, 

 the actual compression of the air within the pipe under different 

 circumstances : from some very slight trials, it seemed to be 

 nearly in the ratio of the frequency of vibrations of each 

 harmonic. 





