MORBID ANATOMY 28 I 



acid but no oxygen. An exact chemical analysis of these 

 gases seems not to have been made. The lymph glands near 

 the tumors are enlarged and full of blood. They contain 

 hemorrhages and are infiltrated with a serous fluid. The 

 afferent lymph vessels are sometimes distended with gases, 

 giving them the appearance of strings of beads. Changes 

 similar to those of the external muscles appear in the muscles 

 of the tongue and pharynx when the disease, as may happen 

 in rare cases, is localized on the oral and pharyngeal mucous 

 membranes. 



A large amount of blood-red exudate is frequently found 

 in the abdominal cavity. In other cases only a small quantity 

 of a serous fluid is present. In still others no changes at all 

 appear. The abdominal changes seem to be determined by 

 the swelling of the muscles, that is, whether it has or has not 

 spread to the peritoneum. Yellow gelatinous and hemorrhagic 

 infiltrations are often met with on the omentum, mesentery 

 and in the neighborhood of the kidneys. The mucous mem- 

 brane of the stomach and small intestines is frequently swollen, 

 congested and infiltrated with hemorrhages, in which case the 

 contents of the intestine are bloody. The liver is hyperemic, 

 but the spleen is usually normal. 



In the thoracic cavity, the pleurae in the neighborhood of 

 the swollen parts of the skin and mediastinum are sometimes 

 hemorrhagic. The pleurae may al.so show large ecchymoses, 

 in which case the thoracic cavity contains a sero-sanious exu- 

 date. Hemorrhages are sometimes present in the lungs, peri- 

 cardium, myocardium and under the endocardium. The 

 muscular tissue of the heart is very soft, but the other muscles 

 show only slight changes. The mucous membrane of the 

 bronchi is sometimes hyperemic and sprinkled with hemor- 

 rhages. 



The blood is of a normal color and coagulates readily. 

 The fluids of the muscles have, according to Feser, an acid 

 reaction, and the flesh becomes rapidly putrid. The bacilli of 

 blackleg are found only in small numbers if at all in the 



