The toxicity or relative strength of the cobra venom has been calculated to be sixteen times that of the European viper.
This toxin-containing broth is injected into a horse in increasing doses, just as in the case of the serpent venom, and after the resistance of the horse has been much increased it is bled into sterilized vessels and the blood is allowed to coagulate.
An excellent account of the nature and of the effect of the venom of snakes, by Charles J.
The vegetable toxalbumoses and the snake-venom group referred to above.
Weir Mitchell and others have shown that serpent venom consists chiefly of albumoses, and the toxins formed by infective bacilli have a somewhat similar chemical nature.