PNEUMONIA. 261 



Second Stage. — The second stage of the disease is marked 

 bj the symptoms taking on a more determinate character, 

 the humming sound disappears, and is succeeded by a faint 

 mucous rattle, or what Laennec denominates " tlie moist crepitus 

 Tonclius ;'''' a sound which can be very closely imitated by placing 

 a painted board before a large fire, and as the paint upon the 

 board rises in blisters, a moist, frizzling sound, may be heard, 

 which is closely similar to the sound in question. This moist 

 rattle may be confined to a small portion of one lung, or it may 

 extend over a large surface, or it may be present in both lungs : 

 double Pneumonia, however, is not common, except in the typhoid 

 forms of the malady, more frequently the affection is limited to 

 one lung. The second stage is also marked by the cough being 

 more frequent, and from its constrained character, it is e\ident 

 the patient suffers pain, and that too of a severe character. 



" The state of the pulse is variable in this disease, according 

 as the parenchyma or the reflected membranes bear the greatest 

 share in the complaint, or as the thoracic cavities are unequally 

 inflamed. It is, however, always qmckened, sometimes even to 

 100 per minute ; it is also in most well-marked cases, small 

 and oppressed, the pulmonary congestion preventing the free 

 passage of blood through the right side of the heart. I have, 

 however, occasionally found it full and bounding ; dependant, 

 probably, on the membranous attack being greater than the 

 parenchymatous. The horse is seen to now look more anxiously 

 round to his sides, the whole body also seems stiff and sore : 

 elevating the head occasions great pain, he stands fixed, the 

 head extended forward and the nostrils outstretched." * 



Thied Stage. — The third stage I consider to be the termi- 

 nating stage of the disease, the peculiar character of which will 



* Blaine's Outlines, Stli Editiou. 



