ACTION ON CIRCULATION AND RESPIRATION. 



115 



Exp. yi. — Jan. 10. — A dog of middle size was laid on the table, and chloro- 

 form administered. While this was being done, the dog salivated profusely 

 and j^assed urine. The heart sounds at the time were perfectly normal. The 

 operation of exposing the carotid was begun at 2.57' p.m. 



Time. 



Mercury. 

 Mx. & Min. 



Mean. 



Pulse. 



Eesp. 



Eemarks. 



P.M. 



2.57' 

 3.41' 30 



3.45' 

 3.48' 



3.55' 



3.55' 20 

 3.56' 30 

 3.59' 30 

 3.59' 45 

 4. 0' 

 4. 0' 15 

 4. 0' 45 

 4. 1' 20 

 4. 1' 50 

 4. 2' 15 

 4. 2' 30 

 4. 2' 45 

 4. 3' 25 

 4. 4 

 4. 4' 45 

 4. 5' 15 

 4. 5' 30 

 4. 7' 

 4. 7' 20 

 4. 8' 

 4. 8' 15 

 4. 8' 40 

 4. 8' 50 

 4. 9' 

 4. 9' 40 

 4.10' 20 

 4.10' 30 

 4.10' 40 

 4.11' 40 

 4.12' 5 

 4.12' 25 

 4.12' 40 

 4.13' 30 

 4.13' 45 



Inch< 



5—6-5 

 5—6-5 

 5—6-5 



5—8 



4-7-8-6 



3 -8—7 -7 

 4—8 



4 -2—8 -3 



5—8 

 6 -9—7 -2 

 4-8— 8-2 

 6 -2—7 -4 



6-3-7 

 6—8 

 5-2-8 

 6-3—7 

 5-8—8 

 6—7 

 6-7 

 6-1—7 

 5-8-7 

 5 -5—7 

 6-3-8 

 6-1—6 

 5-8-6 

 5-8—7 

 5-5-6 

 5-5-7 

 5-3-6 

 5-5-6 

 5-5—7 

 5-3—6 

 5-0-6 

 4-5-6 

 4-5-6 



First incision made. 



Clip removed. Mercury rose. 



The jugular rein was now ti"d. 

 No very marked effect on the 

 mercury. 



The injection of 1 grain or digita- 

 line in about 2 ozs. of water 'w as 

 begun into jugular vein. It 

 filled the syringe four times. 



Injection completed. Dog moans. 



Dog cries. 



Pulse irregulsr. 



Pulse irregular. 



For about three pulsations, or so, 

 the mercujy oscillates within 

 0-2 of an inch, and then there is 

 a sudden rise or fall. 



I 2 



