THIRTY-FIFTH ANNUAL CONVENTION. 101 



There should be good ventilation and pure water. If possible, 

 construct stables so that the sun's rays will penetrate to every 

 part of the structure as the sun-light is the best of all disinfect- 

 ants. 



When we make a study of our pure bred herds and our dairy 

 herds, we find those fundamental laws of life are almost com- 

 pletely ignored. We find that the dairy cow is made into a ma- 

 chine to produce milk, and as a rule she is kept housed constantly, 

 all of which has a tendency to reduce her resisting forces to the 

 minimum, she is therefore an easy prey for the development of 

 any disease. If she becomes exposed to tuberculosis and con- 

 tract it, it will quickly pass from a local to a generalized disease. 

 Cattle that live in the open constantly, seldom have the disease 

 in a generalized form. You will rarely find steers afflicted 

 with it. 



I would like to try this experiment, for instance. Take two 

 herds of dairy cows all of the same grade, free them from tuber- 

 culosis. Place one tuberculous cow in each herd. Place one 

 herd into the hands of a dairyman who would handle the cattle 

 in the same manner as cows are usually handled in dairy dis- 

 tricts. Put the other herd in a pasture where there is plenty 

 to eat and drink; and for shelter, construct an out-building 

 which would be merely a shed. This building should have the 

 south side mostly open, so that the sun could shine on every part 

 of its interior. A complete record of everything should be kept. 

 What do you suppose this would teach us at the end of five years ? 

 We accept the fact that the first herd will produce the most milk 

 at first; at least the record will show that part of the first herd 

 has perished with tuberculosis, and that nearly all of the re- 

 mainder is diseased. 



In herd No. 2, a small percentage would have tuberculosis 

 in local form, the remainder would be healthy ; none would have 

 been lost with tuberculosis, and it would be practically a sound 

 herd. Now take an inventory of the two herds and compare 

 the records for the five years, and note the results. Which has 

 been the most profitable? 



