460 
A. W. CLEMENT. 
are not at all particular about the knives used in dressing, or 
the cloths used in cleaning the carcasses, but will persistently 
use the same knife and the same cloths indiscriminately on 
cattle which are rotten with tuberculosis and those which are 
healthy. It is pretty generally contended at present that 
when the flesh of a bullock is not visibly affected, and when 
there is not general advanced tuberculosis, the meat may be 
eaten with comparative impunity. This question, however, 
requires much further study. 
MEANS OF CONTROLLING AND ERADICATING THE DISEASE. 
Under this head Dr. Pearson further writes as follows: 
Meat Inspection .—To protect consumer and determine dis¬ 
tribution of disease. 
Dairy Inspection .—To protect consumer of milk and re¬ 
move tuberculous cows from dairies. 
After having determined that tuberculosis is present in a 
herd, it becomes necessary to separate the healthy from the 
diseased cattle and thoroughly disinfect the stable. 
In the past the first of these measures has been a matter 
of the gravest difficulty, since tuberculosis of cattle is excess¬ 
ively difficult to diagnose, except when advanced, and in 
the beginning most cases escape the most thorough and 
painstaking physical examination. Various methods of sur¬ 
mounting this obstacle to a perfect division of the herd have 
been suggested ; such as an examination of the bronchial 
mucous, collected through an incision in the trachea with a 
sponge on a wire, the inoculation of guinea-pigs with the 
milk, the inoculation of such animals with extirpated lymph 
glands, etc., but all of these methods are time-consuming, 
difficult and unsatisfactory. 
Soon after the publication of Koch’s work upon tubercu¬ 
lin, the substance was employed on cattle to determine its 
value as a diagnostic agent. It was found that following the 
administration of a proper dose, a febrile reaction occurred 
in tuberculous animals, while no effect was produced in ani¬ 
mals free from tuberculosis. 
In the first summary of results, collected by (Centralblatt 
