82 The Lung Plague of Cattle. 



(c) Stop all Markets and Fairs in Injected Districts. 

 Wherever cattle are brought together from differeni 



herds, any existing contagion is spread with their distri- 

 bution. Where lung plague exists there is the strongest 

 temptation, and the amplest opportunity for the owner 

 to pick out the apparently healthy from the infected lot 

 and send them to market. Many of them will not sicken 

 for one or two months after the purchase, and by this 

 time they will have infected many herds in all districts, 

 far and near. To avoid this otherwise inevitable result, 

 all collections of cattle in infected districts, whether for 

 sale or exhibition, must be strictly prohibited. 



(d) Stop all Movement of Cattle in Infected Districts ex- 

 cept under License after Examination of the Herd by an 

 Expert. 



To the movement of cattle from herd to herd there is 

 precisely the same objection as there is to markets and 

 fairs. The existence of the disease in a herd is often 

 unknown to the nearest neighbors, as its publication 

 would interfere with the sale of stock, meat or milk. It is, 

 therefore, an easy matter for an unscrupulous owner Uj 

 sell the still apparently healthy animals, one by one, to 

 unsuspecting parties and thus realize a salvage from his 

 own infected herd by spreading the plague widely through- 

 out the herds of his neighbors. If, however, cattle ar°, 

 moved only after the lierd has been examined by a veteri- 

 narian and an assurance has been given that no conta- 

 gious disease has been present in it for the past six 

 months, this danger is in great part done away with. It 

 is requisite, however, to examine the whole herd from 

 which the animals are to be moved, as otherwise infected 

 animals in which symptoms have not yet developed will 

 pass the closest scrutiny and be eent on to spread the 

 pestilence. 



(e) Prohibit the Pasturage together of tJie Cattle of different 

 Parties except under tJw Affidavit of each Ou ner that His 



