322 Scientific Intelligence. 
2. On Binaural Audition.*—In a recent number of the Phil- 
osophical Magazine (March, 1879), Srer1nHavsER discusses the — 
theory of direct Binaural Audition. Some of his conclusions are 
pinne of the ears and the line of sight. (3). The smaller the 
angle included between the line of sight and the surfaces o 
pinne, the more certain will be the perception of the direction of 
sound. (4. e hear best with the two ears when the sound 
oat ; ‘oh 
source of sound. (8.) We hear binaurally the best, relatively, 
Should we perceive a fallin : in the intensity of the sound on 
an indication that the source of 
* See this Journal, January, 18.9, p. 64. 
