112 



DR RUTHERFORD ON THE INFLUENCE OF THE VAGUS 



EXPERIMENTS ON RABBITS. 



EXPERIMENT I. — 8th August 1866. — Strong Rabbit. Trachea and Larynx opened. 

 Both Vagi divided in the Neck. Du Bois Reymond's Induction Machine with one 

 Daniell's element employed as the stimulating agent. 







Distance in Millimetres of 



Primary from Secondary Coil 



of Induction Machine. 



Pulse 



in 10". 



State of Laryngeal 

 Muscles. 



Time. 



Before Irritation of 

 Vagus. 



During Irritation of 

 Vagus. 









Cardiac end of 











left Vagus. 





4 



•22' 



740 







Contraction. 





•23' 



800 



51 



50 



Rest. 





■24' 



800—750 



52 



52 







25' 



750—730 



52, 52 



52, 52 



Contraction. 





•26' 



730—700 



51, 52 



52 







27' 



700—670 



51 



51 







28' 



670—640 



52, 52 



52, 52 



» 





30' 



640—620 



51, 52 



52, 51 







31' 



620—630 



51, 50, 51 



51, 50, 50 



» 





33' 



630—640 



50, 51 



51, 50 



» 





38' 



640—600 



52, 51 



50, 51 



» 





•40' 



600—550 



51, 50 



51, 51 



)> 





41' 



550—500 



50, 50 



51, 50 







44' 



500—450 



50 



50 



» 





45' 



450—400 



50 



49 



» 





48' 



400—350 



52, 50 



50 



>> 





52' 



350—300 



50, 50 



50, 48, 49 



!> 





54' 



300—250 



48, 49, 50 



49, 50 



>> 





59' 



250 



50, 49 



49, 49 



» 



5 



r 



250—230 



48, 50 



33, 29 



» 





5' 



250 



48, 48 



48, 48 



)J 



•8' 



240 



48, 49 



19, 19 



3i 



EXPERIMENT II. — Strong Young Rabbit. Trachea and Larynx opened. 



divided in the Neck. 1 Daniell. 



Both Vagi 



Time. 



Distance in Millimetres of 



Primary from Secondary 



Coil 



Pulse 



in 10". 



State of Laryngeal 

 Muscles. 



Before Irritation of 



During Irritation of 







Vagus. 



Vagus. 











Cardiac end of 

 right Vagus. 





10-15' 



550 







Contraction. 



•17' 



700 



45 



45 



Rest. 



•19' 



700—650 



44 



45 



>) 



•21' 



650—600 



46, 45 



46, 46 



» 



•23' 



600—550 



45 



45 



Contraction. 



•28' 



550—450 



46 



46, 46 



V 



•30' 



450—400 



46 



47 



>> 



•32' 



450—400 



46,46 



46, 46 



it 



•34' 



400—350 



46 



46, 45, 46 



» 



•36' 



350—300 



45 



45, 44 



>1 



•38' 



300—250 



44 



45, 44 



>) 



