812 



Tliey are distributed among' llie various stimuli as follows: 



Tlie order of the stimidi varied regulari^'. As a rule stimuli of 

 the same pil-oli acted on the subject in 2 or 3 consecutive tests. 

 Fi'ora (i to 12 experiments were made in succession. 



c^. B. The after-sound immediately following the stimulus is short 

 (1 sec), feeble, and indistinct. Sometimes a short and slight sensation 

 of strain is perceived directly after or simultaneously with the 

 after-sound. Most often the subject announces a period of absolute 

 or relative silence (total absence or considerable decrease of intensity 

 of the murmurs usually perceived during a sta}' of some length in 

 the camera silenta). This interval generally links itself to the after- 

 sound. Ill half the cases it continues from 10 — 16 sec. Little by 

 little the normal noises return inteiisitied. 



M. Directly after the stimulus an after-sound, being a typical 

 murmur with pitch (± fis ,). The pitch disappears after a rather 

 short time; the murmur continues and while being broken from 

 time to time by feebl,e boundary tones, pulsations and the like, 

 passes into the normal noises after 15 to 27 sec. 



f., B. The after-sound follows the stimulus instantaneously; it is 

 a short (± 1 sec), feeble, shrill sound. It is closely followed by a 

 period of absolute or relative silence (1 — IS'/j sec), which is grad- 

 ually filled by reinforced normal noises. During the interval of 

 silence the subject is gensrally conscious of a slight sensation of 

 strain. Occasionally the reinforced noises are interrupted by a musical 

 sound, of a pitch lying between that of the stimulus and that of 

 the succeeding after-sound. 



M. In 5 out of 10 cases a tj |)ical murmur with pitch, is yielded 

 directly after the slinudus. The intensity of tone rapidly diminishes, 

 so that at last only the murmur remains. The tone heard in the 

 murmur, is higher than fis, and afterwards recurs once or twice. 

 In the other cases a tone is heard directly after the stimulus which, 

 while lowering rapidly, sinks into the afore-said typical murmur. 



