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 



