British Association, 80th Report, Sheffield, 1910.] 



[Plate VI. 



.- -_ 



- _ 



a 



a 

 a> 

 o 

 u 

 <a 

 a- 



*? 



O 



a 



it c 



oa 



'a, 



a: 



a 

 o 



Stl 



- 



o 



= 



-_ 



Illustrating the Report on Anesthetics. 



