178 DISEASES OF THE HOrj. 



ODd day after the change from dry food to greea 

 corn diarrhea set in and those which had this 

 complaint bad had the brain symptoms. The ma- 

 jority of the affected ones became wild, would run 

 about, some of them squealing, and would attack 

 poultry of an}' kind and tear them if they got hold 

 of them, they did not attack each other; very soon 

 they would bump up against anything they came 

 in contact with, because they had lost either their 

 sight or sense. I think in most cases both the pigs 

 were in such a state of excitement that it was im- 

 possible to get a correct condition of the pulse or 

 respiration; the pulse as found was full and not 

 fast, but irregular; the pupils of the eyes were very 

 much contracted; some champed the jaws and had 

 considerable froth at the mouth as a result, others 

 did not, but all were very restless without a mo- 

 ment of relief; finally they became exhausted or 

 partially paralyzed or a combination of both, first 

 their hind legs, then the fore, they would then 

 struggle on their side or bellies and soon die. I 

 had one of the pigs killed, and made a hasty exam- 

 ination of the head. I found the membrane of the 

 brain much thickened and very vascular, in fact 

 congested; there was considerable fluid beneath 

 the arachnoid membrane, also in the ventricles and 

 the meshes of the pia matter. The brain itself was 

 not much changed, although there was some ap- 

 pearance of congestion on the cortical substance 

 and the cut surface of the medullary portion was 

 thickly dotted with red spots. I found sufficient 

 alterations of the membranes and brain to account 



