4. Tha,fc the Tubereului test ehould not be applied to 

 any animal having a temperature higher than normal. 



5. That any animal having given one distinct reaction 

 tO' tuberculin should thereafter be regarded as tuberculous.. 



G. That the sub-cutaneous injection of Tuberculin is. 

 the only method of using Tuberculin for the detection ol 

 tubereulosiiS in cattle, which can be recommended at the 

 present time. 



7. That Tul)erculin has no injurious effect on healthy 

 eaft-le. 



Evidence from Tuberculin test — That, a positive re- 

 action to Tuberculin in any properly conducted test, official 

 or othcrwiBe, in any one animal -in any herd, shall be con- 

 sidered- evidence sufficient upon which to declare the herd 

 to be infected." 



Accurate statistics regarding the percentage of Tuber- 

 culosis in O'ur cattle ie not yet available, but it seems fair to 

 conclude that not less than 20% of our dairy cows, are 

 tuberculous. 



Four recent inveetigations taken together show that 

 among 439 sa^mples of milk, 36, or 8.2% , were infected with 

 live, virulent tubercle bacilli. 



Without considering in detail the other various dis- 

 eases toi Vv'hich the cow h liable and regarding which there 

 should always be expert advice by ca.pable veterinary, cer- 

 tain abnormal appearances and conditions can be referred 

 to' in passing. Should the milk be slimy, stringy or ropy^ 

 or ehould the taste be bitter or offensive, should it be 

 visibly colored, red, pink or blue, it should certainly be 

 unsuitable for the market. The udder acts as a natural 

 emunctory, and like the kidney may eliminate active prin- 

 ciples contained in certain foods, drugs or poison, or these 

 conditions may be the result of bacterial growth after the 

 milk leaves the cows. 



We have heard a great deal about the amount of dirt 

 removed from the milk by certain types . of machinery. 

 One estimator says that in Berlin 45 tons of baiiiyaa'd- filth 



83 



