PLEUEO-PNETJMONIA. 603 



experiences also in the act of expiration. Pressure over the 

 intercostal spaces, and pressing on the spine, induce the pain 

 so characteristic of pleurisy, and a deep moan not unfre- 

 quently follows such an experiment. The eyes are bloodshot, 

 mouth clammy, skin dry and tightly bound to the subcu- 

 taneous textures, and the urine is scanty and high-coloured. 



On auscultation, the characteristic dry, sonorous rale of 

 ordinary bronchitis may be detected along the windpipe and 

 in the bronchial tubes. A loud sound of this description is 

 not unfrequently detected at the anterior part of either side 

 of the chest, whilst the respiratory murmur is entirely lost 

 posteriorly, from consolidation of the lung. A decided 

 leathery friction sound is detected over a considerable por- 

 tion of the thoracic surface. As the disease advances, and 

 gangrene, with the production of cavities in the lungs, ensues, 

 loud cavernous rales are heard, which are more or less cir- 

 cumscribed, occasionally attended by a decided metallic noise. 

 When one lung alone is affected, the morbid sounds are con- 

 fined to one side, and on the healthy side the respiratory 

 murmur is uniformly louder all over. 



By carefully auscultating diseased cows from day to day, 

 interesting changes can be discovered during the animal's 

 lifetime. Frequently the abnormal sounds indicate progres- 

 sive destruction ; but at other times portions of lung that 

 have been totally impervious to air, become the seat of sibi- 

 lant rales, and gradually a healthy respiratory murmur proves 

 that, by absorption of the materials that have been plugging 

 the lung-tissue, resolution is fast advancing. I have seen 

 some very remarkable cases of this description. 



Unfortunately, we often find a rapid destruction of lung- 

 tissue, and speedy dissolution. In other cases, the general 

 symptoms of hectic or consumption attend lingering cases, in 

 which the temperature of the body becomes low ; the animal 



