26 



BULLETIN 800, U. S. DEPARTMEISTT OF AGRICULTURE. 



times very violent and apparently accompanied with a good deal 

 of pain. When attempting to rise the animal repeatedly falls, and, 

 because of the inability to raise its head from the ground frequently 

 ruins the sight of the eye on the under side as its head is moved 

 back and forth. It sometimes groans, and the respiration is commonly 

 labored, with forced expiration. The pulse is rapid and weak, but 

 the respiration is not much faster than normal ; the spasms are fre- 

 quently accompanied with convulsive movements of the jaw. 



No series of temperatures were taken in the cases of the horse and 

 steer. Several series were taken of the sheep and with fairly uniform 

 results. Generally speaking there was a marked elevation in temper- 

 ature soon after the first symptoms appeared. In some cases this high 

 temperature appears for only a very short time, while in others, 



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Fig. 2. — Temperature curve of Sheep 461. 



as in Sheep 492, it continues for several hours. In all cases it 

 becomes lower before death. Figure 2 shows the curve of tempera- 

 ture in Sheep 461, figure 3 in Sheep 483, and figure 4 in Sheep 492. 

 In Sheep 461 it ran up to 110.6° F., the highest temperature observed. 

 The increase in temperature, however, was not so marked in all cases. 

 In Sheep 506 it reached only 103.4° F., but in the case of this animal 

 it was distinctly an increase, and as the case continued during the 

 night observations were dropped. A more complete set of observa- 

 tions might have shown more rise in temperature. 



Glover, Newsom, and Eobbins report the temperature of one of 

 their experimental sheep in which a maximum of 110° F. was 

 reached. 



As the illness proceeds, in the intervals between the spasms, while 

 lying upon its side, the animal moves its legs as though walking; 

 these movements may become very rapid, as though the animal were 

 running. These "running" movements are distinctly characteristic 

 of the milkweed poisoning. There may be intervals of coma, but 



