DIAGNOSIS OF TUBERCULOSIS. 
889 
cular diathesis. The observations through the fluoroscope were 
as follows : 
Cow No. i.—The fluoroscopic view on both sides showed a 
RADIOGRAPH NO. 2. 
Tubercular Abscess of Lung (cheesy stage.) 
few undefined opacities in the posterior portion^of the thorax. 
Cow No. 2.—Here the fluoroscopic viewjpresented more and 
somewhat smaller, but less sharply defined shadows, distributed 
over the entire thorax. 
/ 
Cow No. 3.—This presented a similar: view with an ex¬ 
ceptionally dark spot in region of liver. 
Cow No. 4 showed a clean unobstructed view, so clear that 
it enabled me to see the heart in action very distinctly. 
My conclusions were that Cows No. i, 2 and 3 would prove 
to be tuberculous, and Cow No. 4 free from tuberculosis. The 
subjects were then killed and inspected by myself and another 
Inspector of the Bureau of Animal Industry, who had purposely 
