PLEUKO-PNEUMONIA. 601 



professional man can usually detect that tne animal is re- 

 covering, or is passing through a mild attack of the disease. 



Fourthly, In proportion as the animals are closely packed 

 in a confined apartment will the stock most readily take the 

 disease. In a lofty, airy byre, the cases do not oecur so 

 rapidly, and at the onset are milder than in inferior places. 

 We find that the animals most recently introduced into a 

 byre, and whose systems are prejudicially affected by the 

 overcrowding, &c., are the first to be seized. It is usually 

 easy to distinguish which animal has introduced the dis- 

 order, inasmuch as this one will show symptoms very soon 

 after entering its new abode ; and it is not unfrequent that 

 within one month, and often much earlier, from the date of 

 purchase, a diseased animal has either been carted off dead 

 or is convalescent; whereas healthy stock, placed amongst 

 diseased animals, only manifests signs of the disorder between 

 a month and six weeks from the date of its first impure 

 contact. 



Fifthly, Stock in high condition suffers as severely as 

 stock in very low condition. A healthy, moderately-fed ox 

 is more likely to be attacked mildly than a full-fed bullock, 

 or a very lean rich-milking cow. 



Attention has been recently turned to the state of our live- 

 stock markets. It is well known that since the publica- 

 tion of facts demonstrating that cows as frequently take the 

 disease standing in the live market as in a polluted byre, 

 dairymen have adopted various means to keep clear of the 

 public market in Edinburgh, and have preferred paying a 

 better price for a cow at the station, just as she entered the 

 town, than allowing her to approach the stock which visits 

 our market the second time in being transferred diseased 

 from the cowkeeper's shed to the butcher's hand. It is dis- 

 oTaceful to witness the number of diseased cows which are 



