IV. LUNGS AND PLEURÆ 343 Pulmonary congestion 343 Simple pneumonia 343 Pneumonia due to foreign bodies—Mechanical pneumonia 347 Pneumonia due to the migration of foreign bodies from the reticulum 348 Pneumomycosis due to Aspergilli 350 Gangrenous broncho-pneumonia due to foreign bodies 351 Infectious broncho-pneumonia 354 Broncho-pneumonia of sucking calves 356 Sclero-caseous broncho-pneumonia of sheep 358 Pulmonary emphysema 359 Diseases of the pleura 361 Acute pleurisy 361 Chronic pleurisy 362 Pneumo-thorax 362 Hydro-pneumo-thorax and pyo-pneumo-thorax 366 V. DISEASES OF STRUCTURES ENCLOSED WITHIN THE MEDIASTINUM 368 Tumours of the Mediastinum 369 SECTION IV. THE ORGANS OF CIRCULATION. SEMIOLOGY OF THE ORGANS OF CIRCULATION 370 I. CARDIAC ANOMALIES 374 Ectopia of the heart 374 II. PERICARDITIS 375 Exudative pericarditis due to foreign bodies 376 Chronic pericarditis 389 Pseudo-pericarditis 390 III. ENDOCARDITIS 394 IV. DISEASES OF BLOOD-VESSELS 396 Phlebitis 396 Accidental phlebitis 396 Internal infectious phlebitis (Utero-ovarian phlebitis) 398 Umbilical phlebitis of new-born animals 399 Umbilical phlebitis or omphalo-phlebitis 402