8 4 



Scientific Proceedings (52). 



The high proteid concentration did not appreciably lessen the 

 amount or rapidity of absorption, when no such reaction in the 

 tissues took place. Contrary to the conclusion of Walbum the 

 results obtained in four healthy men did not show any appreciable 

 difference in absorption of antitoxin from an antitoxic globulin 

 solution, the proteid concentration of which was equal to that of 

 normal horse serum and one in which the concentration was 

 double that amount. 



56 (752) 



The influence of the vagus nerves on the faradized auricles in 



the dog's heart. 



By G. Canby Robinson. 



[From the Hospital of the Rockefeller Institute for Medical Research, 



New York.] 



The effect of vagus stimulation on the abnormal cardiac 

 activity set up by faradization of the dog's auricle was studied in 

 twenty-three experiments. Faradization of the auricles threw 

 them into a tumultuous activity which in fifteen of the experi- 

 ments persisted after faradization was discontinued from five 

 minutes to over an hour. In these experiments opportunities were 

 afforded for studying the nature of the abnormal auricular activity 

 set up by faradization and for determining what effect stimulation 

 of each vagus nerve had upon it. In several experiments the effect 

 of cutting the vagi while the abnormal activity was present was 

 observed. In eight experiments in which the abnormal activity 

 could not be established independently, the effect of vagus stimula- 

 tion was observed by beginning it before ending the faradization 

 of the auricles. When this was done the abnormal auricular 

 activity usually continued until after the end of vagus stimulation 

 and was affected in the same manner as the continuous or estab- 

 lished tumultuous activity. 



The auricular activity resulting from auricular faradization 

 consisted in very rapid movements, apparently contractions of 

 the whole auricles, which were sufficient to produce definite move- 

 ments of the recording tambour attached to the auricular myo- 

 cardiograph. Beside this rapid auricular tachycardia, fine fibril- 



