226 CLINICAL VETERINARY MEDICINE AND SURGERY. 



capsules are the only organs which have undergone change. On 

 incising the former, tubercles appeared scattered throughout both 

 portions of the parench3^ma. The supra-renal capsules are hyper- 

 trophied, and show on section several little yellowish softened 

 tubercles, the pus from which contains bacilli. In the anterior portion 

 of the sublumbar region, and adherent to the diaphragm, is a 

 lymphatic gland as large as a walnut, the centre purulent. 



" In the thoracic cavity disease is marked. Both lungs are large, 

 dense, and firm to the touch ; their surface is dotted over with greyish- 

 white points and little patches. Palpation reveals hardened granules 

 and a few small areas of fibrous consistence in the superficial layers. 



" Vertical sections have a very diversified appearance, depending on 

 the part of the lobe examined. The anterior part of both lobes shows 

 fine greyish granules, varying in size between a grain of sand and a 

 millet s.eed ; at certain points these become confluent, forming narrow 

 lines or slender irregular bands of lighter colour, which stand out 

 prominently against the deeper tint of the adjacent unchanged tissue, 

 where the vessels are simply engorged with blood. No softened 

 centres are seen in these preliminarj' sections. Towards the base, and 

 in the upper third of the lobes, a few small areas remain in which the 

 lung has preserved its physiological characters. Sections through 

 these are of similar aspect to the preceding. In other regions they 

 show very numerous unsoftened miliary tubercles, at many points 

 confluent, at others separated by hepatised or indurated pulmonary 

 tissue. Certain sections which appear greyish, and of the same firm 

 consistence as in chronic pneumonia, contain enormous numbers of 

 whitish or yellowish granules, masses of broken-down tubercles and 

 irregular cavernous spaces, varying in size up to two inches in diameter, 

 containing pus rich in bacilli : the walls of several of these cavernous 

 spaces are lined by a kind of yellowish diphtheroid exudate. Other 

 sections again show irregular greenish-grey patches, indicating frag- 

 ments of necrotic tissue. In most of the large bronchi the mucous 

 membrane is inflamed and thickened. 



" The right bronchial glands form a number of swellings the size of 

 an almond. The left are fused together into an egg-sized mass, the 

 centre of which contains a cavity filled with viscous, greenish -yellow pus. 

 " Immediately in front of the diaphragm, beneath the vertebral 

 column, are several hypertrophied glands the size of hazel-nuts, with 

 purulent centres. In the posterior mediastinum the supra-oesophageal 

 gland is also swollen and has undergone suppuration ; the chain of 

 oesophageal glands and the lymphatic vessels connecting them are 

 hardened." 



