112 ‘TWENTY-FIFTH ANNIVERSARY REPORT. 
and few have been more important than that of tuberculosis. The 
attempt to stamp out this disease a decade ago failed, largely be- 
cause of the magnitude of the task and the revolt of the public at 
the destruction of so much valuable property. Then followed a 
period of conflicting advice which could not fail to bewilder the 
dairymen. Just at this stage it was discovered that about one-half 
of the animals in the Station herd were affected with this disease. 
Taking advantage of this misfortune, it was decided to follow a plan 
devised by Dr. Bang® of Denmark for ridding the herd of the 
disease. ‘This plan consisted in dividing the herd on the basis of 
the tuberculin test and raising the calves from both divisions upon 
pasteurized milk. The diseased animals were retained for their 
product and for breeding purposes until they showed signs of 
physical breaking down, when they were killed. It was shown 
that when care was exercised the herds could be kept within a few 
feet of each other and the same men could care for both herds 
without spreading the contagion.’ In our case the fifteen diseased 
animals were replaced by an equal number of sound calves within 
four years. There seems to be no good reason why the results 
obtained with the Station herd may not be duplicated by any dairy- 
man who has an otherwise valuable herd which has become affected 
with this disease. 
MILK AND CHEESE STUDIES. 
In addition to the study of the ripening of cheese, which is dis- 
cussed under its own heading,’ considerable work has been done 
which is closely related to this subject. Among the abnormalities 
in flavor or texture which sometimes confront the dairyman there 
are few which are not commonly referred to the food of the cows. 
Except in rare instances there is really little foundation for this 
charge except the fact that it creates less bad feeling to assign as 
the cause the depraved taste of the animal rather than some negli- 
gence of its owner. 
Fishy flavor — We investigated a case? where the output of a. 
dairy was rendered unsalable because of a penetrating, disagree- 
*Bang, B.- The struggle with tuberculosis in Denmark. The Veter- 
inarian, 68:688 (1895). 
Bang, B. Tuberculosis in cattle. Appendix, Bulletin 75 of the De- 
partment of Agriculture of the State of Pennsylvania (1901). 
*Bal. 277; same in Rpt. 25:27-55 (1906). 
®*See page 185. 
* Bul. 183:179-181; same in Rpt. 19:36-38 (1900). 
ee pial 
