292 



^lANUAL OF POISONOUS PLANTS 



the same as those in animals that died in various parts of the state. The black horse, 

 John, was found in the afternoon of April 2 to be swaying in his gait. He refused feed, 

 had the peculiar dullness of the eyes, and when his limbs were crossed he remained in 

 that position entirely motionless for some time. The next morning the animal was very 

 much worse and at noon he was killed so that an autopsy could be held. The post-mortem 

 examination showed that all organs were practically normal except the brain which was much 

 softer than normal. I will quote the description of the post mortem as given by Dr. Butler, 

 which is as follows: "On removal of the brain the superior surface of the right cerebral hemi- 

 sphere was noticed to be slightly flattened over the anterior half. Palpation revealed a soft 

 spot at this place. An incision through the apparently sound gray matter revealed what 

 Mayo described as a sereous abscess in which floated flocculi of broken down brain sub- 

 stance, which presented the appearance, as one stockman said, of a mixture of vinegar 

 and curdled milk. This portion of softened and broken-down white brain substance is in 

 no sense a serous abscess. The line of demarcation between the broken-down and the healthy 

 brain substance was not clearly marked, but surrounding the completely broken-down por- 

 tion of a zone probably half an inch thick that was softer than normal and of a slightly yellow 

 color. The liquid in the cavity, and in which floated portions of soft and partially broken-down 

 brain substance, was slightly yellow, but in no instance was clotted blood or any other 

 microscopic evidence of a hemorrhage to be found." 



Dr. Butler and Dr. Mayo conducted an experiment with some mouldy corn 

 from a farmer who lost four registered Percheron horses at Wakefield, 

 Kansas. Four hundred pounds of the worst of this corn and fifty pounds of 

 the chaff and screenings were sent to the Agricultural College in Manhattan, 

 Kansas, and a feeding experiment was started with two colts, twenty-three 

 months old. The experiment began on July 16, when each colt received V/z 

 kilos twice daily. On July 22, they were fed V/z kilos of corn and cob meal 

 twice daily. On the 26th of July 134 kilos of the damaged corn, well ground, 

 cob and all. This was continued until August 19. One colt died August 21. 

 Another experiment was conducted with a two year old colt, but fed with 

 mouldy corn and good prairie hay. The temperature of the animal varied 

 from 101-102° F. This colt died on July 26, the feeding experiment having 



Fig. 107. Dermal mycosis associated with Sarcoptic mange caused by Fusarium equinum, 

 conidia and mycelium. 2-6. Conidia (macroconidia) in various stages of development. 

 4. Germinating. After Melvin and Mohler. 



