250 



EXPERIMENTAL PHONETICS. 



The amplitudes of the tracings thus obtained from the tones of the 

 voice were 25 millimeters (1 inch), while those of the mirror were only 

 0.125 millimeter (one two-hundredth inch). 



Fig. 1.).— examples of flame pictures obtained by Konig's system of a monometric (>apsule adapted 

 to two organ pipes. The figures to the k'l't iudicatC the ratio of the vibrations of the two tones 

 forming the compound tone. 



Fig. 16.— Vibrating flame of cyanogen photographed by Gerhardt. 



RigoUot and Chavanon," in 18S8, constructed a mirror apparatus 

 shown in fig. 20, and Hermann,'^ in 1889, used a somewhat similar 

 arrangement, the tracings of which are given in fig. 21. 



"Journal de Physique, 1883. 



^Hermann: Pfltiger's Archiv., 1889. 



