PNEUMONIA. 



491 



against the wall. Sensation was lost throughout the affected limb 

 except in the region served by the femoral nerve ; it was intact in the 

 left limb and in all the other hind parts. At 3 p.m. the animal la)' 

 down on the left side, became greatly excited ; respiration was moan- 

 ing, and death occurred during the night. 



Autopsy. — Muscles pale; mesentery and epiploon congested; liver 

 large, friable, and of pale colour; spleen and kidneys normal. 



In the pleural sac was a little yellowish serosity. The right lung 

 had not collapsed, but adhered by its anterior lobe to the costal pleura, 

 and by its postero-inferior part to the mediastinum. It showed lesions 

 of lobular pneumonia. According to the point chosen it appeared 

 black, bluish, deep red, bright red, or greyish in colour, the tints cor- 

 responding to centres of hepatisation, oedema, or emphysema. Palpa- 

 tion revealed dense hepatised areas, separated by yielding tracts of 

 healthy pulmonary tissue. Sections of the upper and posterior parts 

 appeared emphysematous, congested, or cedepiatous, according to the 

 point chosen ; the middle region showed hepatised areas, purulent 

 centres, and cedema. One of the abscesses contained a fragment of 

 necrotic tissue as large as an orange. Some of the bronchioles were 

 obstructed by fibrinous clots. The left lung was unaffected. The 



Chart VIII. 



hepatised centres in the right lobe contained large numbers of different 

 bacteria, streptococci and staphylococci predominating. 



The heart was large, and showed ecchymoses along the vascular 

 furrows, particularly at the base of the ventricles. It was discoloured, 

 the greater part of the left ventricle being stained yellow, but the col- 

 oration was less marked over the right. Sections were deep red, pale 

 red, or yellowish in colour. On laying open the left ventricle the 

 decoloration of the myocardium was very striking ; the muscle appeared 

 greyish yellow, and was dotted with ecchymotic patches under the 

 endocardium and pericardium. Its tissue was infiltrated ; the surface 

 of sections was covered with a viscous exudate. The mitral valves 

 were intact ; the aortic sigmoid valves were thickened and infiltrated, 

 showed a few light red spots at their base, and several little hard. 



