23 



The separation of the herd into two divisions had to be made by 

 erecting a wooden partition from floor to ceiling across the stable. 

 This was tightened hy covering one side with bnilding paper. The 

 wall was made so that it could be moved without difficulty whenever 

 an enlargement of the healthy division should be desirable. For the 

 reception of tlie healthy animals that part of the stable connected 

 with the calf-stable was taken. This then formed an integral part 

 of the space allotted to the healthy division. Care was observed to 

 use different implements in tlie two divisions. "^"^ Beside this each 

 division was provided with its separate stable-hands. 



The entire herd of 208 head was inoculated in Apr. 1892. About 

 80 per cent of the milch cows, about 40 per cent of the bulls, 

 and about 40 per cent of the calves and heifers reacted. Al- 

 though the herd had in general a healthy appearance and the 

 losses caused by tuberculosis were by no means considerable, 

 here, as in other large herds of milch cows, the disease proved 

 to be widely spread. The reacting calves were immediately 

 butchered, and the remainder of the herd was separated into 

 two divisions which, during the summer, were pastured some 

 distance apart. The entire stable was then carefully disinfected 

 and this operation was afterwards repeated every spring. The cows 

 of the reacting division, which during the year showed noticeable 

 clinical evidence of tuberculosis, were immediately butchered. It 

 was then decided to inoculate the healthy division twice yearly, just 

 before and after pasturing. This was done in order to separate 

 animals which, in spite of the division, appeared to be infected. 



All female calves and several males, even those of the reacting 

 division were raised, but immediately after birth, the latter were 

 removed from the infected stable and placed in the healthy division. 

 From the first I feared the possibility of a frequent appearance of 

 foetal tuberculosis, and it was therefore decided to inoculate the 

 calves with tuberculin very shortly after birth. Up to the making of 

 this test they were kept in little rooms made by dividing the calf 

 boxes. The inoculation was conducted during the course of the 

 winter at intervals of from 4 to 6 weeks, so that on each occasion the 

 calves born in the meantime were injected. This precaution proved 

 to be superfluous for thus far only two calves have been found to be 

 born with tuberculosis. 



60. To this point I wish to direct especial attention. The precaution seems to 

 be self explanatory and yet it is just here that the farmers are most often at fault. 



