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PROCEEDINGS OF THE AMERICAN ACADEMY 



lution per second, and reproduced at speeds varying from the lowest 

 to the highest attainable, gave the following sounds : — 



il e e i. 



The last mentioned sound was given out only at the extreme upper 

 limit of speed. 



(8) The vowel e spoken with a speed of about two revolutions 

 per second was reproduced at a lower speed as u, but at all attain- 

 able higher speeds still retained its vowel character as e. 



The following tables contain the results of later experiments in 

 which the speed of revolution was measured. Table I. contains 

 results reached when a single vowel was sounded and reproduced at 

 various speeds. The first column contains the serial number of the 

 experiment; the second, the name of the vowel; the third, the rate 

 of revolution of the cylinder of the phonograph when the vowel was 

 spoken into the mouthpiece and its record impressed upon the 

 wax; and the fourth, the vowel sounds observed when the spoken 

 sound was reproduced at various speeds, R v The speed is denoted 

 in revolutions per second. 



TABLE I. 



