106 ON DIGITALIS, WITH SOME OBSERVATIONS ON THE URTNE. 



experiment, instead of tlie nozzle which I had before described, a straight one 

 was used of a much smaller bore, which was farther diminished by a stopcock 

 upon it. 



Exp. II. — Nov. 29. — In this experiment the nozzle was wider, and the 

 apparatus was just as described at the beginning, the hsemadynamometer 

 showing the mean only being employed. The same dog was used which had 

 been experimented on on the 25th. Chloroform was given as formerly. 



Time. 



Pulse. 



Kesp. 



Eemarks. 



P.M. 



1.58' 

 2.5' 30 



2.ir 



2.14' 

 2.17' 

 2.19' 

 2.20' 45 

 2.22' 30 

 2.23' 15 



2.25' 

 2.25' 



Inches. 



5-55 

 5-4 

 5-3 

 5 15 

 5-4 



5-45 



5 '5 — 5 '55 



5-3 



5-5 



•55 



120 

 125 



172 



148 



200 



26 



180 



I made the first incision. 



Carotid exposed, and ligatured at distal 



end. 

 Nozzle inserted. 

 Clip relaxed. 



5 '4 appears to be about the average. 

 External jugular vein tied. 



Half a grain of digitaline in water was in- 

 jected into the jugular vein. Mercury 

 immediately indicated 5 '4. 



Suddenly fell to 5 "3. 



As suddenly rose to 5-5. Then fell again. 



Heart's action extremely irregular. 



Still extreme irregularity in the pulsations. 



Breathing extremely rapid. 



Mercury rose to 4*8. Eespirations are not 



so rapid as they were at 27'. 

 Pulse more regular. 



Respiration much quieter. 



Pulse still regular. Oscillations slight. 

 Column is, on an average, at 4*6, and is 

 less violently affected than before injec- 

 tion. 



Regular. 



Pupils dilated, and imperfectly contrac- 

 tile to light. 



Pulse weaker. 

 Pulse very weak. 



