THE BOG INDUSTRY. 1 1 5 
Symptoms of poisoning. -Poisoning is manifested in a peculiar man- 
ner. In many cases pii;s thai are apparently well in the evening are 
found dead in the morning, and often the most careful watching fails 
to show any indications of indisposition. Where symptoms are pres- 
ent those most characteristic seem to be disorder of respiration, which 
is manifested by quickened breathing, coughing, or hiccough. Fail- 
Log appetite usually calls the attention of the feeder to the approach 
of danger. Seldom more than two days intervene between the first 
symptom and death. Francis a gives the following symptoms of the 
trouble with the Texas pigs : 
The attack was sudden, as a rale; in fact, in a majority of cases an animal was 
found dead that had been apparently well twelve hours before. In those cases 
which we were fortunate enough to witness the symptoms were those of a sudden 
contraction of the diaphragm, producing a sound similar to hiccough in man. 
The animal stood with head near the ground, the flanks tucked up, the ears hang- 
ing pendulous, and the tail straight and limp. Some would lie flat on the belly — 
never on the side — while others would assume a sitting-up posture with the fore 
legs well apart. In several cases there was a marked elevation of temperature, 
the thermometer registering 106" F. per rectum. The circulation seemed very 
weak and rapid. * * * As a rule they were dead in an hour. * * * The 
gaspings became more and more frequent and violent, and after a few straggles 
the animal was dead. In the last moments great quantities of foam or froth would 
come from the nose or mouth. 
The symptoms observed by Dinwiddie b are described as follows : 
The disease in all cases was of a type which might be described as acute. In 
several instances the animals were said to be ' ' off feed ' ' for one or two days 
before other symptoms were observed. Every animal which exhibited any symp- 
toms at all died within twenty-four hours. It would remain by itself, standing, 
disinclined to move, breathing with extreme rapidity and jerking or '"thumping "' 
in 'the flanks, and before death frothing at the mouth and nostrils. Fever was 
absent or but slight; eyes dull and sometimes bloodshot. Coughing occasionally 
occurred. 
Pathological features. — Francis a states: "On postmortem examina- 
tion the digestive organs appeared normal throughout. The other 
abdominal organs appeared normal. The respiratory organs were 
full of foam. The lungs themselves were bright red and very much 
congested and doughy." Mayo c pronounced the death of the Kansas 
pigs to be due in all cases to "congestion and inflammation of the 
intestines, lungs, and heart;" but Mles rf could find no assignable 
cause of death in the case of the Iowa pigs. 
Dinwiddie, b in the Arkansas experiments, made postmortem exam- 
inations of 8 of the 9 pigs which died, and found a very constant con- 
dition of disorder. He says, in describing the first examination, the 
description of which applied to all cases : 
The body presented no external changes. Subcutaneous tissue showed blood 
extravasations in streaks and points. Blood engorgement of lymph nodes of neck 
"Bui. No. 81, Texas Expt. Sta. ^Bul. No. 53, Kansas Expt. Sta. 
6 Bui. No. 76, Arkansas Expt. Sta. (1 Bui. No. 28, Iowa Expt. Sta. 
