Plate I. Enlargement of tuberculous nieiliastinal glands in a dog. ((. 

 Mediastinal lymph-gland which takes up almost the whole portion of the 

 thorax situated above and behind the heart, with the exception of a small 

 strip (c) ; h. trachea with its main branches; c. and d. pulmonary 

 tissue filled with air; e. heart; /. apex of the diaphragm with the liver 

 (indistinct on account of respiratory movements) ; g. humerus and be- 

 hind it the shadow of the muscles (Eontgenograph). 



