PHYSIOLOGICAL ACTION OF VENOM OF BLACK SNAKE. 199 
, 
Experiment I. 
| } | or 
pe "ae Quantity of | vee Riad, 7G cis reduced - 00 | 
: ae Condition. awed | vols. of arteri al blood. | 
| | COs a 8 
he i | Before venom injected | 0065 gramme = 38°43 | 21°30 | 
| ‘lLhour after injection. | 8875 1 19°48 | 
| Blood pressure fairly ee | 
| | high, respiration shal- i | | 
| lower than previously. 
Experiment II. 
: | | Vols. of gases at “at 0° 
bien ig Condition sagen of 760 mm. in Hg-in 100v Py 
animal, : Pe veri ry of blood from femoral vein 
| Tr OO, fee 
ee Before injection _..| 0105 gramme | 44°56 6°35 
0 minutes after injec- 49°24 4°60 
tion; circulation and 
respiration much en- | 
feebled 
35 - 45 minutes after the injection the tension 
of CO, in the blood from the femoral vein 
was found to be a Ok Be 2 : of an atmosphere 
45-55 minutes after — WAR © (J we Bol cad 
‘iheecos 895°). ” 
Experiment III. 
ee ee 
Vols. at 0° and 7! 
oe Quantity of ov 100 vals, nit f blood 
Condition. Pherae Aes: m femoral v' 
injected. aime. 
Before injection ..| °001 gramme 40°13 T7138 
30 minutes after... es 40°40 
2 da after a 39°92 9°25 
Respiration and circu. 
lation. ae main tainbal 
“scaled after sie tension COs it in — vein ae 63 ong 
= 282 5 
5 3 is a re =403 \ 3-96 
m minutes i 3 pe B=3-901 
minutes : o A=3°63 
after injecti c : B=3°78 e 3705 
; in the sian of venom introduced v was ages nies ee : 
