WESTERN SNEEZE WEED AS A POISONOUS PLANT. 25 
Depression. — The first symptom noted in the corral cases is de- 
pression. In very mild cases this may be the only symptom noted, 
and probably in most range cases is overlooked. This is shown in 
the attitude of Sheep 314. (PI. I, fig. 5.) 
Pulse. — -In most cases the pulse is weak, irregular, and somewhat 
rapid. Of these characteristics the irregularity is most noticeable, 
and in mild cases this and depression may be the only symptoms 
noted. Of course in range cases this is never recognized. 
Weakness. — Accompanying the depression and weak and irregular 
pulse is a general weakness, which is more pronounced in the pro- 
longed cases. This is shown in Sheep 374 (PL II, fig. 1) and still more 
clearly in Sheep 421 (PI. I, figs. 1, 2, 3, 4, 5, and 6). In some of the 
acute cases this weakness does not appear at all. 
Restlessness. — -Both in the early and later stages of the sickness, the 
animals generally exhibit marked restlessness. If they are strong 
enough to stand on their feet they will remain standing but a short 
time, when they will lie down and then very soon get up again and 
move about in an uneasy way. 
Stiffness. — During the sickness a peculiar stiffness in gait fre- 
quently is noticed. This accompanies the weakness, though it is 
not a result simply of weakness, and may be considered somewhat 
characteristic of the intermediate stages. 
Temperature. — There are no marked changes in the temperature, 
and it remains practically normal during the period of illness. 
Respiration. — The respiration is quickened when the animal at- 
tempts to get up on its feet, and is also more rapid during the acute 
stages of the sickness. There are no peculiarities of respiration which 
can be considered as characteristic of H. hoopesii poisoning. 
Salivation. — Salivation occurred in many of the force-fed animals 
and in some of those poisoned by prolonged feeding. In some cases 
the salivation resulted in profuse frothing at the mouth. Doubtless 
this was due in some measure to mechanical irritation caused by the 
method of forced feeding, but this was not the complete explana- 
tion; salivation may be considered as a common symptom in the 
forced-feeding cases and as a symptom which occasionally occurs in 
chronic cases. Sheep 358 (PI. II, fig. 2) is a good example of a salivated 
animal. 
Nausea.— Nausea was exhibited in many of the animals; it did not 
however, always result in vomiting. In some of the acute cases vomit- 
ing did not take place, although it did in some of those in which re- 
peated forced feeding were made. Generally speaking, in the pro- 
longed cases vomiting, or " spewing," as it is called by the sheepmen, 
is the most prominent symptom of H. hoopesii poisoning. In range 
animals it is practically the only symptom which is noticed by the 
