No. n. DRPARTMRNT OF Ar.RTriTr.TT'UE. 147 



breaks and on account oC ilu' \ < ly nionldy condition of some of it, 

 I obtained a sample and look it to tlie Veterinary Hospital of the 

 University ot Pennsylvania for trial. For the trial a nine-year 

 old-gelding- was used that liad been in the hospital for two months. 

 This gelding- had been quite stilf from osteoporosis, but had recov- 

 ered largely from his lameness, was well nourished, vigorous, and 

 in good general condition. 



The feeding experiment started on October 30th and continued 

 until November 2d. The horse ate altogether approximately one- 

 half bushel of silage mixed with oats and bran. November 2d he 

 ate and swallowed slowly and with some difficulty. His tempera- 

 ture was 100 degrees F. There was no evidence of pain. November 

 3d there was well-marked paresis of the throat and of the muscles of 

 mastication. The temperature was 100.5 degrees F. There was 

 twitching of the muscles of the flank and shoulder, desire to lie down 

 much of the time, and some difficulty in arising. The inability 

 to swallow continued, and the general muscular weakness pro- 

 gressed, in the evening the horse w^as unable to stand. The brain 

 was clear. There was no pain. The horse died at 9 A. M., No- 

 vember 4tli. Autopsy negative except for swelling and dark red, 

 almost black color of mucous membrane of pharynx and glottis. 

 The mucous membrane of the larynx was congested. The mucous 

 membrane of the stomach was also much congested and showed 

 some eccliymotic spots on soft mucosa. The stomach contents 

 had a putrid odor. A bolus of partially chewed hay was lodged 

 between the teeth and cheek, and this had a very putrid odoi*. 

 There appeared to be an excess of cerebrospinal fluid. The brain 

 and cord and their meninges were normal. 



Another horse, a gelding ten years old, with ringbones on both 

 front pasterns, but otherwise healthy, was given on November 5th 

 four gallons of water that had percolated through a bushel of silage. 

 November Gth he was given three gallons of water from the same 

 silage. November 8th lie was given six quarts of silage. Novem- 

 ber 9th he was offered four quarts of silage, but did not eat more 

 than half of it. Up to November Gth in the afternoon no abnor- 

 mal condition was noted. It was then observed that he chewed 

 and swallowed slowly. In the evening there was a little tremor of 

 the muscles of the shoulder and partial paralysis of the throat, but 

 he could drink very slowly. He laid down most of the time and was 

 weak. Temi)erature 98.2 degrees F. No pain. November 10th 

 the horse was found dead in his stall, having died during the night. 

 Upon autopsy lesions similar to those described above were found, 

 but all were less well marked. Other investigations in this con- 

 nection are now being made, and will be reported later. 



As to the name that is usually applied to this disease — i. .?., 



