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Taronchial lymphatic glauds that lie along the bronchi, and 

 the mediastiual lymphatics that lie along the surface of the 

 thoracic portion of the oesophagus are usually involved 

 when the lungs are tuberculous. 



(b). The pleura or serous membrane, lining the chest or 

 lung cavity aad reflected over the lung^, is involved next in 

 frequency to the lungs. This msmbrane, when tuberculous, 

 is covered or filled with numerous, small pearly tubercles, 

 called by the butchers "grapes." The tubercle bacilli, as a 

 rule, reach the pleura from the lungs, and occasionally the 

 germs come from the abdominal organs by way of the dia- 

 phragm. 



(c). The mesenteric glands or small lymph glands of the 

 mesentery are nearly always infected when infection takes 

 place by way of the digestive tract. When tuberculous, 

 these glands are enlarged and they may contain cheesy 

 masses if the disease is of long standing. Or there may be 

 minute miliary tubercles in the mesentary. Tubercles may 

 appear in the peritoneum, the membrane lining the abdomi- 

 nal cavity. Sometimes Peyers patches in the small intes- 

 tines may become tuberculous and occasionally tuberculous 

 ulcers or tubercles may develop in the stomach, and other 

 parts of the alimentary canal. 



(d). The liver is not as frequently involved as the mes- 

 entery. It is very probable that the bacilli gain admission 

 to the liver by way of the portal circulation from the intes- 

 tinal tract. In the liver the tubercles may be small grayish 

 bodies or large, yellow cheesy masses. 



(e). The spleen and kidneys are rarely involved. As a 

 rule, they are tuberculous when the disease becomes gener- 

 alized or involves many organs and is widely distributed in 

 the body. 



(fj. The uterus or womb is very rarely tuberculous. 

 When involved its walls are greatly thickened and the mu- 

 cous membrane is covered with ulcers and tubercles are 

 numerous in tisues of its walls. 



• (g). The udder may be tuberculous in comparatively 

 rare instances. When tuberculous, the udder becomes 



