50 Report oF DEPARTMENT OF ANIMAL HUSBANDRY OF THE 
Test of November, 1905.— The sound herd now contained the 
twenty-eight animals which did not react in May and two calves, 
one descended from each herd. None of these animals gave any 
reaction to the tuberculin. 
Millie D. was the only member of the diseased animals which 
was tested at this time. She again failed to react. 
This test practically closes this experiment as we had now thirty 
sound animals which was the total number in our herd at the 
time we undertook to stop the further spread of the disease and 
replace the diseased animals by healthy calves. 
SUMMARY OF CONDITION OF STATION HERD. 
Table II shows the progress of the work during the four 
years, giving the standing of the herds at each test as well as 
the changes occurring during the preceding six months. From 
the table it will be seen that it took four years to replace the 
seventeen animals which were diseased at the beginning, the two 
which later contracted the disease, the four which were burned 
with the barn, and the two which were sold, making a total of © 
twenty-five. Of this number of calves eleven have descended from 
the thirteen sound animals and fourteen from the seventeen dis- 
eased animals. The contribution from the diseased herd was 
affected by the removal of nine of the cows during the first year 
of the experiment without their producing offspring and by two 
of the remainder producing only bull calves. 
This work was carried out in the face of as many natural dif- 
ficulties as can ordinarily be expected in an average dairy. It is 
accordingly believed that with good care the rebuilding of a simi- 
lar herd can be regularly accomplished in from three to five years. 
