538 
S. STEWART. 
size of a pea to an egg, and even attain the weight of ten pounds 
or more. Tubercles or masses when found on free surfaces 
have the appearance of granulation tissue, but when cut across 
the centres are found to consist of semi-solid, whitish, caseous 
material, and in chronic cases may contain small particles of 
lime salts, giving this cheese-like substance a gritty feeling to 
the touch. Sometimes the necrosed tissue in the tuberculous 
glands of the neck and thorax and in large tubercular masses in 
the substance of the lungs and liver, may be liquid or partly 
liquid. It is a very difficult matter to detect the tuberculous 
animal when confined with others in slaughter house yards, as 
there are no pathogenomic signs which plainly and certainly 
distinguish it from the non-tuberculous, unless it be in the cow 
bearing the tuberculous udder and contiguous lymphatic glands. 
By tactile examination any considerable development of tu¬ 
bercle in the lymphatic glands above and behind the udder, or 
in the udder itself may be recognized by the nodular character 
of the induration present. The non-tubercular induration of 
this organ giving a more uniformly smooth surface to the touch. 
Upon post-mortem examination the observer will readily 
discover when present the granular appearing tubercular 
growths on the serous surface covering any viscus, or lining 
the thoracic or peritoneal cavity. I know of no normal or 
other pathological condition presenting a similar appearance. 
These growths are nearly always present either in the thoracic 
or peritoneal cavity, in cases of generalized tuberculosis. The 
serous membranes lining the thorax and abdomen are easily 
torn out and with them these telltale evidences of generalized 
infection. Bnlarged lymphatic glands and abnormalities in ap¬ 
pearance of the visceral organs will attract attention, by section 
of which the character of the disorder may be determined. It 
is differentiated from actinomycosis by the small yellowish 
points and the actinomyces grains of the latter disease, and 
from parasitic and other abscesses by the character of contents, 
and the presence or absence of like lesions elsewhere, and if 
necessary by aid of the microscope. In ordinary post-mortem 
