Studies in Forage Poisoning V. 87 



animals consumed, and the quantity varied with the thirst of 

 the animal. 



Beginning February 13th, 1917, experimental sorrel horse 

 No. 95 was allowed wholesome feed and water from the oat hay 

 barrel. On February 23rd this animal died. 57 gallons of the 

 oat hay water were consumed by this animal, or an average of 

 5.7 gallons per day. Beginning February 20th a brown mare 

 No. 96 was allowed water from the barrel of oat hay and whole- 

 some feed each day. On March 3rd this animal succumbed. 

 The record of the amount of water consumed from day to day 

 by this animal was accidentally destroyed. The symptoms pre- 

 ceding death and the anatomic changes observed upon autopsy 

 in Nos. 95 and 96 were somewhat similar to observations made 

 in similarly infected animals. From February 28th to March 28th 

 a gray horse. No. 108, and a white horse, No. 113, were allowed 

 water from the barrel of oat hay without harmful effect. No. 

 108 consumed approximately 214 gallons of water or 7+ gallons 

 per day. No. 113 consumed approximately 159 gallons of water, 

 or 5+ gallons per day. Beginning March 6th a bay horse, No. 

 115, and a bay mare. No. 102, were allowed to drink the oat 

 hay water from the barrel. On March 12th horse No. 102 suc- 

 cumbed after consuming 27 gallons of the water, or an average 

 of 4+ gallons per day. No. 115 consumed 144 gallons of the 

 water without noticeable effect, an average of 4+ gallons per 

 day, and was released April 6th. The resistance of horses Nos. 

 108, 113, and 115 to the oat hay water suggested that these ani- 

 mals might have possessed a natural or acquired tolerance or 

 that the etiologic factor had been diminished by dilution. 



On March 28th, 1917, Nos. 108 and 113 each received 2 

 cc. of broth culture of the organism isolated from the oat hay, 

 mixed in wholesome feed, followed daily with wholesome water 

 and the usual wholesome feed which had been supplied during 

 the thirty days the oat hay water had been consumed. No. 108 

 was in a decumbent position and moribund at 7 a. m. March 

 30th (Fig. 35 photographed at 11:30 a. m. March 30th), death 

 occurring the following day. The anatomic alterations observed 

 upon autopsy were similar to those observed in other experi- 

 mental horses similarlv infected. The inner wall of the small 



