726 Experiments 



When placed upon the table, has abundant froth in the mouth; 

 is in very violent opisthotonos, replaced from time to time by a 

 pleurosthotonos on the right side; at times strong clonic convulsions, 

 with a few intervals of complete repose. During the attacks, respira- 

 tion stops, and it is very difficult to detect the heart beats. The eye 

 remains sensitive. 



At 5:15, the temperature is 36.7°, and the pulse only 20. 



At 5:30; respiratory rate 48, pulse 112. 



At 5:38, a little while after a strong convulsion, I draw 33 cc. 

 of very red blood D 



At 5:45, temperature 35°. 



I had the dog inhale chloroform through the trachea; respiration 

 is very active; the feet are then stiffened. Soon the respiration stops 

 in its turn; the eyes are very much swollen. 



I use artificial respiration; the heart resumes strongly enough, 

 and respiration returns; then everything stops in spite of artificial 

 respiration, and the animal dies about 6 o'clock. 



The serum of the blood, treated by sulfate of soda and animal 

 charcoal, gives with copper reagent a very abundant yellowish-red 

 precipitate. 



Blood A (air, normal pressure, normal respiration) 2 15.1; CO, 40.8 

 Blood B (air, normal pressure, tracheal respiration) O, 20.3; CO ; 24.0 



Blood C (oxygen, 6% atmospheres) 2 34.6; C0 2 92.5; N 3.6 



Blood D (during convulsions) O, 19.0; C0 2 14.8 



The composition of the air of the bag, before the experiment, be- 

 ing 80% of oxygen, the tension at the time of drawing blood was 

 about 6.75 x 84 = 567. 



Experiment CCLXXXVI. January 22. Temperature 16°. Large 

 dog. 



At 3:10, tube placed in the trachea; rectal temperature 39.5°. 



At 3:30, the animal breathing slowly and deeply, 33 cc. of carotid 

 blood drawn A 



At 3:40, dog is placed in the compression cylinder, with the 

 rubber bag containing air with 88.6% oxygen. 



At 4 o'clock, pressure is 4 atmospheres; then 33 cc. of very red 

 blood drawn B 



At 4:15, pressure is 6V2 atmospheres. Drew 38 cc. of very red 

 blood, which coagulates very rapidly C 



At 4:17, decompressed in 2 minutes. 



Taken out in strong convulsions. They consist of attacks of stiff- 

 ness of the paws and of the body in opisthotonos, so strong that the 

 dog can be carried by one paw, like a piece of wood. (See Fig. 61.) 

 They can be brought on at will. 



Rectal temperature 37°. 



At 4:40, drew 33 cc. of moderately red blood; the temperature 

 has dropped to 36° D 



The convulsions continue to decrease; the cannula is removed. 

 At 5:35, the convulsions have stopped. I draw a little carotid blood, 

 which, boiled with charcoal and sulfate of soda, gives a very strong 



