558 



THE OUTGO OF ENERGY 



(compare page 336) is increased and the time of 

 its passage across the auriculo-ventricular groove 

 is shortened, though this cannot be observed by 

 the method used in the present experiment. 



THE INHIBITORY NERVES OF THE HEART 



The Preparation of the Vagus Nerve. Fasten 

 a large frog on the board, back down. Pass the 



Fig. 73. Scheme of the cervical nerves in the frog (after Schenck). 

 G. P. Glosso-pharyngeus. Hg. Hypoglossus. V. Vagus. L. Laryngeus. 

 K. Posterior end of lower jaw. The glosso-pharyngeus has been drawn 

 to one side of the hypoglossus for the sake of clearness. 



glass tube through the oesophagus into the 

 stomach. Remove the muscles lying over the 

 petrohyoid muscle, which passes from the base of 

 the skull to the horn of the hyoid bone. --Lying 



