794 



INDEX 



White blood-corpuscles, migration of, 373' Yellow spot, 697 

 origin of, 259 



physiologic properties, 257 Zymogen, 152 

 varieties of, 258 pepsinogen, 171 



Work accomplished by muscles 70, 79 " ptyalogen, 152 



Wrisberg, nerve of, 642, 662 trypsinogen, 191 



