6 



and the whole of the other comparatively sound, exhibiting, it 

 may be, only some slight traces of inflammation. The hepatization 

 will be found to have changed the light healthy consistency 

 of the lung to a heavy, liver-like substance, which, when cut into, 

 exactly resembles a brown marble with white or greyish streats 

 running through it in all directions. The hepatization increases 

 the weight of a lung ten, twenty, and sometimes ey an forty fold. 



Third Stage. 



In the tliird or last stage the disease assumes a more typhoid 

 form, and the animal appears to suffer less pain, — so much so that 

 a person unacquainted with the deadly leaden hue which the eye 

 now assumes, imagines that a recovery has commenced. In this 

 stage the animal will generally stand up under a tree, emitting, 

 when moved, a low sound between a grunt and a moan ; and it 

 will frequently charge when approached or disturbed. The back 

 will be raised, the head protruded, and the eye, which is now 

 sunk, will assume a deadly appearance ; the droppings will be 

 black and scanty; the cough, which is now comparatively soft and 

 faint, will be frequent, with expectorations of bloody mucus ; 

 the tongue swells and protrudes, and there will sometimes be a 

 thick ropy discharge from the nose and eyes ; hoven will not 

 unfrequently occur ; respiration will become impeded and difficult ; 

 and the animal will speedily sink and die. 



In milch cows, besides these symptoms the following will be 

 observed : — The grunt will be increased, the breath will stink ; 

 they will frequently grind their teeth ; there will be great restless- 

 ness as death approaches ; while the skin and horns will be cold, 

 and the pulse accelerated to twice its natural speed. 



The post mortem appearances here are the same as those de- 

 scribed in the second stage, but in a much more aggravated form. 

 Thus, in the dry form, where pneumonia prevails, the whole of one 

 lung and a portion of the other will be hepatized. In the more 

 badly diseased lung, the hepatization, where it has first commenced, 

 will be darker and more gangrenous in appearance. Around the 

 outside of this lung, and attaching it to the ribs, there will be a 

 coating of coagulable lymph (a straw-coloured, fatty looking sub- 

 stance), which sometimes extends to the pleurae; while in the 

 cavity of the chest there will be a considerable quantity of 

 serum, — a fluid of a bloody tinge. In the ivet form, where 

 pleurisy prevails, a very much greater quantity of serum will be 

 found in the chest, — sometimes nearly a bucketful ; and floating 

 in this serum will be shreds of coagulable lymph, frequently 

 covering the pleurje, which when exposed are found to be highly 

 inflamed. One of the lungs will be found to be moi-e or less 

 diseased and covered with lymph. In the combined form the 

 disease (both dry and wet) again — where pneumonia and 



