d States it was found possible to prevent the further spread of
the contagion and to eradicate it after a few months' delay.

In 1886 pleuropneumonia was discovered in some of the large distillery
stables of Chicago and among cows on neighboring lots. This led to renewed
efforts for the complete extirpation of this disease from the country.
Congress in 1887 enlarged the appropriation available for this purpose and
gave more extended authority. During the same year the disease was stamped
out of Chicago, and has not since appeared in any district west of the
Allegheny Mountains.

The work of eradication was at the same time commenced in all the infected
States. Before the end of the year 1889 Pennsylvania, Delaware, Maryland,
the District of Columbia, and Virginia had been freed from the disease.
More difficulties, however, were encountered in the States of New York and
New Jersey, on account of the larger territory infected and the density of
the population. The long struggle was successful, however, and the last
animal in which the disease appeared in the State of New York was
slaughtered early in 1891, and the last one affected in New Jersey met the
same fate early in the spring of 1892.

[Illustration: PLATE XXIX.
Haines del. ZEESE-WILKINSON CO., INC., N.Y.
UPPER OR DORSAL SURFACE OF THE LUNGS OF THE OX.
(ONE-TWELFTH NATURAL SIZE.)]

[Illustration: PLATE XXX.
Haines del. ZEESE-WILKINSON CO., INC., N.Y.
BRONCHOPNEUMONIA.]

[Illustration: Plate XXXI.
Fig. 1
Fig. 2
Haines del. ZEESE-WILKINSON CO., INC., N.Y.
CONTAGIOUS PLEUROPNEUMONIA.]

[Illustration: PLATE XXXII.
Haines del. ZEESE-WILKINSON CO., INC., N.Y.
CONTAGIOUS PLEUROPNEUMONIA.]

During these same years a supreme effort had been made to stamp out this
lung plague from Great Britain. From the official reports it appears that
the number of infected districts and of diseased animals had rapidly
diminished, but it was not until 1898 that the infection was finally
eradicated.

The other infected European countries, though they maintain a veterinary
sanitary service, are not making satisfactory progress in eradicating the
disease. This is owing partly to delays in carrying out the provisions of
the laws and partly to mistaken ideas as to the measures which are
necessary to accomplish the object. The United States was the last of the
countries having old infected districts which undertook to sta