ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 29 C, 



drink without undue exposure to the elements, especially sudden 

 changes from heat to cold, and without overtaxing those physical powers 

 which have their limits in all living things as well as in the machines 

 which man constructs. 



Briefly stated the objections to the use of tuberculin may be summed 

 up as follows: 



1. The temperature of healthy animals and those affected with other 

 diseases sometimes rises after the injection of tuberculin. 



2. Some tuberculous animals do not react to the tuberculin, 



3. Tuberculin does not determine the stage of the disease, but cod- 

 demns animals which might live for years and possibly recover. 



4. Tuberculin may produce he disease in healthy animals and cer- 

 tainly hastens its progress in those affected. 



5. It is claimed that identically the same action as that of tubercu- 

 lin can be produced by the injection of the extracts of other products of 

 various bacteria, even such as are known to have no disease producing 

 properties. 



6. Tuberculin is a poison and it is not desirable to inject a poison 

 into the circulation of a cow that is giving milk for human use. 



7. It develops the germ it was intended to kill; adding poison to 

 poison, it is cumulative in its effect. 



8. The particular cases have been too few to warrant a general con- 

 clusion. Because it has apparently caused no injury to some healt]li3r 

 cattle it can not be assumed that it is harmless to all healthy cattle. 



9. The expert skill, knowledge of the herd and entire control of all 

 the conditions which made the reputation of tuberculin as a diagnostic 

 at the experiment stations are unattainable and impossible in its general 

 application. 



10. Socalled tuberculosis can be stamped out in any herd of cattle 

 without using the tuberculin test. 



11. The compulsory slaughter of cattle under the tuberculin test has 

 been condemned and abandoned wherever it has been tried to any great 

 extent. This is notably true in the states of New York and Massachu- 

 setts. 



