STATE DAIRY ASSOCIATION. 36I 



Dr. Luckey — The barn I had reference to was well supplied with 

 light and ventilation. These things are important, but you must not get 

 the impression that these things are all that is necessary to prevent 

 tuberculosis — that is absolutely wrong. You can put your cattle in the 

 best barn in the United States — the most wholesome barn you can get — 

 but if you put diseased cattle in with yours, you will have trouble, re- 

 gardless of light and ventilation. We want to prevent the spread of 

 tuberculosis, but we cannot do it with pure air and sunshine. 



Mr. . Can I make the test myself on my own cows? 



Dr. Luckey — I won't say that everyone can do it right, but so far 

 as I am concerned, there is no objection to your doing it. Every 

 dairyman should learn to test his own herd. The veterinarian or State 

 veterinarian, or someone who thoroughly understands the work, can 

 show the dairymen how to make the test, and then the dairymen can go 

 to work and test their own herds after they thoroughly understand it. 

 This test is one of the most useful things in connection with the dairy. 

 Dr. Connaway — The work which Dr. Luckey is doing to free the 

 infected cattle herds of the State from tuberculosis, and to prevent the 

 introduction of the disease into herds that are now free from it, should 

 have the commendation and active support of every dairyman and cattle 

 breeder in the State. He is not offering to you a new and untried ex- 

 periment, but a plan which the dairymen of Denmark, Norway and 

 Sweden have found to be the salvation of their herds. A few brief 

 statistics will illustrate this : Previous to the discovery of tuberculin, 

 and its use as a diagnostic agent, Prof. Bang of Copenhagen had at- 

 tempted to free the dairy herds of Denmark from tuberculosis by separ- 

 ating all cattle, that showed any signs of this disease, from those that 

 appeared to be healthy, and raising the calves of diseased cows on 

 sterile milk. Progress by this plan, however, was discouragingly slow 

 from the fact that a considerable number of the animals that were sup- 

 posed to be healthy, were in fact badly diseased, although this could not 

 be determined by the ordinary means of diagnosis then in use. How- 

 ever, by the aid of tuberculin as a diagnostic agent, the separation of 

 the diseased from the healthy cattle was more perfect. He began the 

 use of the tuberculin test in 1893, and within the two and one-half years 

 following, tested over 53,000 head of cattle and found nearly 40 per 

 cent affected with tuberculosis — an average of slightly more than 21,000 

 head per year were tested. Compare this with the tests made in the 

 year 1902, the latest complete statistics I have at hand, and yon will find 

 in this year a little more than 23,000 head were tested, with only 10.8 



