246 Veterinary Medicine. 



become vascular and from the tenth to the fourteenth day com- 

 menced to organize into the connective tissue. With the advent 

 of this stage, the inflammatory action tended to subside, and the 

 reabsorption and repair to ensue. 



Pleuritic effnsio7i. This varies greatly at the different stages of 

 the disease. As effused it has a composition resembling that of 

 the blood :— 



Water, ---911 to 924 



Albumen, - - - - - - - - - 63.33 to 82.50 



Fibrine formers, ------ 2.16 to 12.50 



Extractive matter. 

 Salts. 

 The progressive changes from the haemorrhagic effusion to the 

 limpid hydrothorax and their relation to the different stages of the 

 disease and the subsidence of the inflammation are of the greatest 

 importance in deciding questions of responsibility, when the 

 animal has recently changed hands. St. Cyr has classified his 

 cases in the following instructive table : 



Up to the 7th day 50 per cent were dark red ; after the 7th da)^ 

 only 13.3 per cent ; and after the 15th day none. Up to the 7th 

 day 83.3 per cent were either dark red or sero-sanguineous and 

 not one had attained to translucency. After the 7th day only 8 

 percent were of port wine hue, and by the i5tli day 24 per cent, 

 of all cases of over seven days standing were already transparent. 

 Of all cases of over 15 days standing, 80 per cent, were perfectly 

 translucent and none showed the dark red hue. Finally after the 

 30th day all remaining cases were limpid. This of course must 

 not be applied with the same confidence in both directions. While 

 translucency of the effusion bespeaks seven days standing and 



