138 



DR RUTHERFORD ON THE INFLUENCE OF THE VAGUS 



Result. — Division of vagi followed by increased pressure, but no change in 

 frequency of pulse. 



EXPERIMENT XL. — A Strong Eabbit, which had Fasted foe Twelve Hours, was Fed 

 at 1-30 p.m. Canula in Carotid. Trachea open. 



Time. 



Pulse in 10". 



Mean Pressure in inches 

 ofHg. 



General Notes. 



3- 5' 



38 



35 





6' 



38 



3-4 





8' 



39 



3-55 



Both depressors divided. 



9' 







10 milligrammes atropia sulphate 

 injected into vein. 



10' 20" 



42 



35 





11' 40" 







Right vagus divided. 



12' 20" 



41 



37 





14' 







Left vagus divided. 



16' 



46 



4-2 





19' 10" 



45 



4-4 





21' 15" 



44 



43 





22' 







Cardio-inhibitory nerves still para- 

 lysed. 



Result. — Division of vagi followed by increased pressure and acceleration of 

 pulse. 



EXPERIMENT XLI. — A Strong Rabbit fed at 1 p.m. Canula in Carotid Artery. 



Trachea open. 



Time. 



Pulse in 10". 



Mean Pressure in inches 

 ofHg. 



General Notes. 



3-19' 



42 



33 





20' 



43 



34 





24' 







10 milligrammes atropia sulphate 

 injected into vein. 



3-25' 



52 



35 





26' 10" 







Both depressors divided. 



27' 40" 



47 



4-1 





28' 30" 



45 



4 





29' 25" 







Right vagus divided. 



31' 



46 



4-2 





32' 5" 







Left vagus divided. 



34' 



50 



4-8 





35' 



52 



4-7 





38' 15" 



51 



4-8 





40' 35" 



50 



4-9 





Result. — Increase of pressure and acceleration of pulse following division of 



vagi. 



