12 BULLETIN 969, U. S. DEPARTMENT OF AGRICULTURE, 



glandular tissue had occurred, especially into the medullary portion 

 of the lobules. Around some blood vessels in the thymus of Sheep 

 595 there were many large, coarsely granular cells, which had a 

 strong alBnity for eosin. These closely resembled eosinophiles, 

 except that many were rather large and had nuclei almost circular 

 in outline. The lymphoid cells appeared to be normal. Some 

 brownish pigment was present, and in a few small veins in Sheep 

 590 the erythrocytes appeared as though fused. 



Spleen. — In the specimen from the spleen of Sheep 590 there were 

 small areas of congestion in the splenic pulp. The samples from 

 Sheep 595 contained very little blood. In both cases some brownish 

 pigment was present, and in the tissue from Sheep 590 some cavernous 

 veins contained pale and disintegrated erythrocytes. 



Lymph glands. — A mesenteric lymph gland and a small group of 

 hemolymph nodes from Sheep 590 were studied. There was no 

 indication of an effect on lymphoid cells, but some erythrocyte de- 

 struction was apparent. In the lymph gland many endothelial cells 

 contained ingested erytlu"ocytes in various stages of destruction. 

 In the hemolymph nodes there were areas where practically all 

 erythrocytes stained very poorly. 



Alimentary tract. — Specimens from the abomasum, duodenum, 

 jejunum, ileum, and cecum were studied. There was a well-marked 

 infiltration of leucocytes into the mucosa of the various portions 

 of the small intestine and the one sample of cecum examined. These 

 were of the polymorphonuclear and plasma cell types. Congestion 

 accompanied with diapedesis of erythrocytes and edema was present 

 in some places, and in all portions of the small intestine the villi and 

 that portion of the mucosa next the lumen of the intestine were more 

 necrotic than one would expect in an animal that had been dead so 

 short a time. 



The glandular epithelial cells were swollen and many small nuclei, 

 probably of leucocytes, were very commonly lying in the epithelial 

 layer and sometimes in the lumen of the gland. Many such nuclei 

 were degenerated. In places the veins contained pale erythrocytes, 

 granular material, and sometimes a fibrinlike network and numerous 

 leucocytes. 



The lympxi nodes of the ileum of Sheep 590 were edematous and 

 contained an unusual number of phagocytic cells, which had in- 

 gested erythrocytes and pigment or partially digested granules of 

 nuclear material. 



Nervous ^^ss^te.— Specimens of cerebrum, cerebellum, medulla, 

 and cervical and lumbar portions of the spinal cord were examined. 

 None of these was severely congested, though minute hemorrhages 

 were formed in various places. These were presumably due to diape- 

 desis of the red corpuscles, as ruptured vessels were not found. In 

 most hemorrhages the erythrocytes were confined to the perivascular 



