522 



A TEXTBOOK OF PHYSIOLOGY 



FIG. 181. SYLVESTER'S METHOD: MEANS OF PRODUCING INSPIRATION. 



FIG. 18lA. SYLVESTER'S METHOD: MEANS OF PRODUCING FXTIRAIION. 



FIG. 182. SCHAF*R'S METHOD OF ARTIFICIAL RESPIRATION. (From Rowland's 

 " Hygiene for Teachers.") 



