rniLOSOPHICAL SOCIETY OP WASHINGTON, 



73 



TABLE Y. — Direction of sound as determined by both 

 ears used simultaneously . 



TABLE YI. — Direction of sound as determined by both 

 ears used simultaneously. 



Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 

 Alt 

 Az. 



True 

 direction 

 of sound. 



+45 

 +45 

 H-45 

 +45 

 +45 

 +45 

 +45 

 +45 







+45 



+90 



+135 



180 



—135 



90 



45 



OBSERVERS. 



No. 1. 





 





 +22 









 —10 









 +45 

 + 90 

 +23 





 —68 

 —60 

 —60 



No. 2. 



+22 

 —10 

 —45 

 +22 

 +80 





 + 10 











+45 

 +90 

 +68 

 +23 

 -68 

 —90 

 —45 



No. 3. 





 +10 





 +22 

 —10 

 +10 













 +45 

 +90 

 +60 





 —68 

 —90 

 —90 



Wo. 4. 



+ 90 

 +45 

 +10 

 —30 

 +45 

 +10 

 +45 

 +45 







+45 



+ 68 



+113 







—113 



90 



45 



No. 6. 



+45 

 +10 

 -22 





 —45 

 +36 

 -22 







+45 



+ 68 



+150 



±180 



]20 



-90 



-45 



