WHAT PROFESSOR BANG’s WORK TEACHES. 169 
and contagious diseases, when the losses already incurred by 
this source are assuming a serious aspect as regards the dairying 
interests and threaten to become a barrier to the continuance of 
the valuable control work now going on ? Work, which at this 
time must not be stopped, and which can be best perpetuated by 
the veterinarians individually assisting it, for we live in deed 
not years ; in thoughts not breaths, in feelings, not in figures on 
a dial. 
WHAT PROFESSOR BANG’S WORK TEACHES. 
By Leonard Pearson, B. Sc., V. M. D. 
A Paper read before the meeting of the Keystone Veterinary Medical Association, 
March 9, 1897. 
Professor Bang of the Imperial Veterinary School in Copen¬ 
hagen, Denmark, is one of the greatest authorities on tubercu¬ 
losis of cattle. His researches in this field have been published 
from time to time during the last fifteen years and to him belongs 
the credit of having first discovered and called attention to many 
of the facts in connection with this disease that were previously 
unknown, but have since been repeatedly observed and re¬ 
demonstrated. 
Prof. Bang’s country is one of the smallest of Europe, but its 
inhabitants are thrifty, frugal people of a high order of intelli¬ 
gence and much conservatism. They depend largely, if not 
principally, upon the dairy for their support, and although the 
country has a population of but 2,200,000 and an area of but 
little over 15,000 square miles, about one-third the area of Penn¬ 
sylvania, there are in Denmark about 1,700,000 cattle (approxi¬ 
mately the number in Pennsylvania). 
To illustrate the importance of the dairy it may be stated 
that in 1890 Denmark exported more than $22,000,000 of butter 
and more than $2,000,000 worth of cattle. This amounts to 
more than $10 for each inhabitant of the country. It has been 
known for a long time that tuberculosis is a widespread disease 
among the cattle of Denmark and various measures have been 
recommended and applied with a view to its suppression. 
