112 



KENNELL Y-T A YLOR— EXPLORATIONS OVER [April 22, 



sizes or pitches, at a definite distance from their orifices. If, in a 

 given geometrical environment, pipes of different pitches are set up, 

 in succession, at the same position with respect to the exploring 

 diaphragm, then the observed amplitudes, multiplied by the respec- 

 tive values of w, should lie on the velocity circle-diagram, if the 

 vmf.'s of the pipes are the same; assuming that the fundamental 

 mode of vibration is produced, that the constants of the diaphragm 

 remain unchanged, and that the overtones of the pipes are negligibly 

 small. The vector departures from the circle diagram would then 

 indicate the inequalities in vmf.'s. 



Q 



(1000) 



Fig. 12. Diagram Showing Strengths of Organ Pipes Given by the Vibration 



of a Diaphragm. 



