50 TUBERCULIN, ITS HISTORY, PREPARATION AND USE. 



milk of the guaranteed healthy cows, or with milk 



from their own mothers — but only after it has been 



heated up to a teniperature of 190 degrees Fahr. for 30 



minutes. 

 IX. — When any animal in the reacting or diseased division 



shows signs of sickness, it should be destroyed. 

 X. — No new animal should be introduced into the healthy 



division unless it has passed the tuberculin test. 

 XL — Avoid breeding from very young or too old cows, as 



the ofispring is apt to be weak and puny. 

 XII. ^ — No consumptive person should be allowed to work 



amongst the cattle or prepare their food. 



CONCLUSIONS. 



By following these rules the unsound animals will be wiped 

 out, but hardly before they have replenished the healthy divi- 

 sions to its original dimensions. Of course, if only a few 

 animals are found tuberculous, it will not pay to go to the trouble 

 and expense of keeping them as a separate herd ; but when 

 dealing with a considerable number of valuable prize animals, 

 whose qualities are worth propagating, it will undoubtedly pay, 

 as demonstrated by several authorities, to adopt the above 

 method. 



It is simply a question of which is the cheaper course in the 

 end, to try and x*aise a sound herd from an unsound one by 

 observing rigid rules, or to get rid of all the tuberculous animals 

 at once. Each stud breeder or dairy farmer must determine 

 this for himself, and in doing so must not overlook the fact that 

 heredity and predisposition are mere minor factors in the pro- 

 duction of tul)erculosis. 



FRAUDULENT PRACTICE IN CONNECTION WITH 

 THE TUBERCULIN TEST. 

 To those who have devoted several years in watching the 

 practical working of the test, it was quite easy to see how readily 

 frauds might be, and, in fact, have been perpetrated by evil 

 •disposed persons, and it is only right, in my opinion, that the 

 method of working these frauds should be exposed. 



