LAEKSPUK POISONING OP LIVE STOCK. 63 



but was resumed on September 9. From this time until September 

 14 he ate 78.25 pounds of Delphmium> harheyi. The material fed 

 in these later experiments was mature and dry. No effect resulted 

 from the larkspur feeding except that part of the time the horse 

 seemed sleepy and lifeless. Tt should be noted that this feeding 

 was rather late in the season, when, as shown elsewhere, the lark- 

 spur is only slightly toxic. 



Case 78. 



Case 78 was a horse weighing about 600 pounds, which had already 

 been used at Hugo in the loco experiments. An attempt was made 

 early in July to feed it both Delphinium harheyi and DelphiniuTn 

 mensiesii, but without any effect. On August 23 it was brought 

 into the corrals in order to try a prolonged feeding experiment 

 with DelphiniuTn harbeyi. The material given was collected in 

 Kebler Pass and consisted of tops, including the fruit. The 

 animal was fed from August 24 to September 2, inclusive. During 

 this time it ate 168^ pounds, or, in the ratio of its weight, the quan- 

 tity eaten was as 1 to 3.6. No effect of the feeding was noticed 

 until September 2. Between 10 and 11 o'clock of the morning of 

 September 2 it was noticed that the action of the hind legs was 

 stiff and that the animal acted as if he did not have complete control 

 of his legs. There was some trembling of the muscles of the flanks 

 and twitching of the muscles of the lips and nostrils. The ab- 

 dominal muscles contracted as though in pain. In walking he 

 straddled with his hind legs and appeared weak behind. He was 

 constantly moving about, apparently from pain. The back was 

 arched up, and he was very much constipated. At 11.25 he was 

 given some hay and commenced to eat it, but while eating stepped 

 about uneasily as though in pain. At 12.15 he was found down, but 

 was started up and got upon his feet without any difficulty, although 

 his movements after rising were somewhat uncertain. After rising 

 he kept walking about, evidently feeling very uncomfortable. He 

 lay down again at 12.25. His respiration at this time was 78. Fig- 

 ures 1, 2, 3, and 4 of Plate XIV show various attitudes assumed 

 during his illness; figure 1 shows clearly the discomfort under which 

 the animal was laboring; figure 2 shows him after he lay down; 

 figure 3 shows his attitude at 1.08, when he was most severely ill; 

 and figure 4 shows him a little later than this when he was upon 

 his feet but still feeling great discomfort. At 1.55 he was lying 

 down again, and when started and run around the corral he moved 

 readily, showing little tendency to stagger or to fall. At 3 p. m. 

 he was found standing in the corral, his lips no longer trembling, 

 and he no longer had a tendency to walk about uneasily as earlier in 

 the day. His gait was slow, however, and he was sleepy. At this 



