ARSENICAL POISONING FROM SMELTER SMOKE. 
411 
colt, the autopsy of which was made August n, 1906, and was 
No. 36 of this series. This case is of special interest because the 
diagnosis was contested vigorously and with great confidence by 
the defense. The writer in making the autopsy did not examine 
the anterior mesenteric artery and the experts for the defence, 
arriving soon after he had left, did examine this artery and al¬ 
leged that it was completely obstructed by a thrombus, and that 
this obstruction was the cause of the pathological condition which 
caused the animal’s death. 
The writer’s autopsy notes were as follows: Subject, two- 
year-old colt, weight about 1000 pounds; had recently died; no 
odor of decomposition. 
Lungs very much congested, especially in the dependent por¬ 
tions. Hemorrhage into some of the lobules and interlobular 
lymph spaces. Mucous surface of trachea deeply congested and 
very red. Extravasations under the serous membrane of 
thoracic cavity beneath the spine. 
Abundant, blood-tinged effusion in the pericardium. 
Stomach, acutely congested; many hemorrhages of small ex¬ 
tent under lining membrane of cardiac portion; recent hemor¬ 
rhage in pyloric portion and in anterior portion of duodenum. 
Many hemorrhages under serous coat of small intestines, from 
mere points up to inch in diameter. Mucous coat of small in¬ 
testine acutely inflamed, in parts blood red; in anterior portion 
pigmented and hemorrhagic; in median portion gray and catar¬ 
rhal ; in posterior portion the contents were tinged with blood. 
Colon acutely congested, mucous membrane dark red; hemor¬ 
rhages from a point to several inches across. Caecum, entire 
mucous membrane dark red. 
Kidneys much congested; right weighed 3% and left 3^2 
pounds. 
Spleen large, soft, almost a pulp, weight 5 pounds. 
Liver, large, soft, weight 25 pounds, contained 2.2 parts of 
arsenic per million. 
Bladder very much congested, hemorrhagic at opening of 
ureter, at which point was a firm, dark brown coagulum, ap- 
