80 



EXPERIMENTAL PHYSIOLOGY 



FIQ. 67. MOSSO'S AIW-PLETHYSMOGRAPH. 



p.r. 



pi. gl 



68 DIAGRAM OP KIDNEY PLETHYSMOGRAPH. pi., PLETHYSMOGRAPH; gl., GLASS COVER; 



ff, GAP FOR PASSAGE OP BLOOD-VESSELS AND URETER ; p.r. PISTON RECORDER. 



