448 POISONING BY THE ARSENIATE OF POTASH. 
floating portion of the colon. The lungs were sound ; the heart 
enlarged, and the left ventricle highly ecchymosed at its base. 
5. An entire horse; died 32 hours after the poison, and six 
after the administration of the antidote. The stomach contained 
its natural quantity of food, on the surface of which were, here 
and there, black spots : the mucous membrane of the right 
curvature of the stomach was highly injected. The small intes¬ 
tines were filled with a blackish-green substance, which seemed 
to be the counter-poison, mixed with the natural contents of the 
intestines: the mucous membrane was red, as was that of the 
colon. The left ventricle of the heart presented the same 
ecchymoses as in the others. 
6. An entire horse; died 54 hours after the poison, and 36 
after the antidote. The stomach and small intestines contained 
a black-green fluid, as in the last horse. All the viscera were 
inflamed ; and the left ventricle of the heart had the same ec¬ 
chymoses. 
7. An entire horse; died nine days after the poison, and eight 
days after the antidote. The peritoneum generally was red; the 
epidermoid membrane of the left curvature of the stomach peeled 
off in flakes ; the mucous membrane of the right curvature was 
ecchymosed and softened ; the muscular coat was of a purple- 
red colour. The small intestine was filled with a black foetid 
mass; there was no change in the caecum, but the membrane of 
the colon was thickened and congested with blood, particularly 
at its pelvic cavity. The heart swam in a bloody fluid; the 
right ventricle was filled with blood, and its membrane was red¬ 
dened : the left presented numerous ecchymoses, but not so dark 
or so large as in the other cases. 
It results from this— 
1. That the seven horses were, without doubt, poisoned by the 
arseniate of potash. 
2. That the presence and agency of this poison was manifest 
in all of them by violent colic and diarrhoea, the latter of which 
ceased only with the life of the animal. 
3. That inflammation was found either in the stomach, or the 
intestines, or the bladder, or in all of these viscera at the same time. 
4. That in all these animals ecchymoses were observed at the 
base of the left ventricle of the heart, unaccompanied by any 
lesion of the same kind in the other cavities. 
5. That the matters contained in the stomach and bladder of 
the first horse did not exhibit any trace of poison. 
6. That the hydrated trioxide of iron was administered to 
three of them as an antidote, but without saving the life of 
either of them. 
