45 8 History of Aiiimal Plagues. 



fests itself on a mountain where a certain number of cattle find 

 their subsistence during the winter. It has happened that the 

 cattle of the plains hav^e remained in healthy but that those on 

 the neighbouring mountains have been infected, and thus the 

 herds of the republic have been encircled by the contagion. 

 This has occurred sometimes on the mountains of Petite Bour- 

 gogne; and though we have admonished the inhabitants of the 

 Valley of Lake Joux^ they more than once have been found in 

 the midst of the infected villages of Bourgogne. In these un- 

 happy circumstances, it is to be recommended that the moun- 

 tain-passes should be closed, and all communication cut off 

 from the infected pasturages. Inspectors ought to make a visit 

 every fifteen days to the mountains where the cattle belonging 

 to the subjects of the State are kept, in order to examine with 

 great care if any beasts are in a suspicious condition, or if, with- 

 out exception, they are in health. When the time arrives that 

 these animals should be brought from the mountains after they 

 have passed the summer in Bourgogne without being infected, 

 the proprietors should be compelled to keep them for six weeks 

 on the lower hills — which are isolated, and separated, so as to 

 prevent their mixing with the cattle of the country. These 

 places should also be visited every fifteen days, and it is only 

 after this quarantine, and according to circumstances, that they 

 be permitted to enter the valleys when we can assure ourselves 

 there is no danger. 



' In those instances where the infected mountains of our 

 neighbours abut too closely on our own, these last should be 

 most strictly guarded, and it should not be for less than a year 

 after the disease has disappeared that anv communication be 

 allowed; as experience has amply demonstrated that cattle not 

 suspected of disease have been attacked by the contagion by 

 grazing on mountains in the neighbourhood of those infected. 



13. 



^When, unfortunately, this contagion has penetrated from 

 the neighbouring mountains to our own, the danger is extreme. 

 The number of cattle which pasture on a mountain is much 

 greater than in a stable, and by these all mixing in search of 



