190 



EXPERIMENTAL PHYSIOLOGY 



inside to receive the kidney. The one orifice is then tightly closed by the 

 cork B, and a special two-way cannula fitted into the other. The instrument 



Inst. Co. Ltd. CAMb. 

 Fig. 152. — Two Sizes of Roy's Kidney Oncometer. 



is then placed in an air-bath to raise its temperature to body ternperature. 

 When the kidney is inserted between the two halves, the peritoneal membrane, 



Inst. Co. Ltd. Cams. 

 Fig. 153. — To Illustrate the Principle of Roy's Oncometer. 



