PHYSIOLOGICAL ACTION OF VENOM OF BLACK SNAKE. 265 
(c)—Observations on the respiration after intravenous injection. 
Experiment 9—Rabbit, weight 1-1 kilogramme ; vagi intact. 
Respiration. 
Time. ood 
Amplitude| Rate per | pressure Remarks. 
hrs, mins. secs.| in mm. | minute, | 12 ™™. 
Normal 15 37 98 ‘Ol gramme per kilo. of venom 
previously heated to 85° C 
injected into external jugu- 
lar vein; injection lasted 
three minutes. 
O86 14 64 86 
00426 6 48 80 
Re Be 8 30 81 66 
oes 0 35 86 44, 
Dog = @ 15 56 36 
a oy 10 40 40 heart beat imperceptible 
ee | eee 6 11 28 34 
eae ae Bod 42 convulsions 
i AL 55 10 8 
ts Th 80 or 5 dead 
In this experiment the activity of the respiration was rhythmical 
after the injection of the poison. It first became increased in 
: m on the circulatory mechanism,’ 
amplitude and rate of the respiratory movements are recorded 
together with the blood pressure.) 
Experiment 10—Dog, weight 5:75 kilos., (065 gramme morphia 
mn 
hypodermically ; vagi uncut; ether during operation. 
Time. ___ Respiration. 
: : Amplitude| Rate per | pressure Remarks. 
hrs. mins. secs, in mm, , minute, | a 
‘oe eaten es 
Normal 24 12 124 |-00075 gramme per kilo. injected 
into jugular vein 
nih de ae ae 12 32  |heart beat nearly imperceptible 
a ° 16 12 44 ‘heart beat increased 
lero gee Be 
a 8 | 1g 
1 30 0 10 4 Al 
t 40 0 ll 3 38 
1 S : 8 3 37 
a. 7 2 33 ae 
] on 0 tee hte 27 ~—‘joccasional inspiratory gasps 
2 1 6 0 21 |dead 
