BOVINE TUBERCULOSIS. 
325 
acted but to a less degree. This animal was killed June ioand 
No. 7 July 2d. 
With the animals of this lot immunity was slow and irregu¬ 
lar. 
With the exception of a few coughing spells these animals 
remained in apparent health. 
Autopsies. 
Cozv No. 7 (killed July 2d).—The mouth, the velum of the 
palate, the pharynx, the larynx and the trachea do not present 
anything abnormal. The sub-glossal and pharyngeal glands 
are swollen and succulent, but they do not seem to show any 
tubercular lesion. 
Both lungs are infiltrated with a considerable number of 
tubercles, miliary or pisiform, sound, hard and firm. A cut 
shows them to be formed of a thick fibrous shell, containing a 
small caseic focus nowhere softened or calcified. 
The ganglions of the mediastinum are almost all infiltrated 
with miliary nodules in process of caseification, but their 
lesions are not as gross as those of the glands of Cow No. 5. 
The bronchial glands present the same alteration, only a 
little more advanced. All the viscera of the abdominal cavitv 
and their lymphatics seem to be normal. 
Cow No. 8 (killed June 10).—The mouth, the velum of the 
palate, the pharynx, the larynx and the trachea are sound. Two 
retropharyngeal glands are hypertrophied and saturated with a 
serosity. They are infiltrated at their anterior extremity, with 
a few miliary tubercles, translucent or opaque, not yet caseified. 
Both lungs are teeming with extremely fine miliary tuber¬ 
cles and the most are translucent ; a few attain the size of a 
small pea ; their centre is opaque, whitish and caseic, having 
but a thin envelope of gray tissue, rather transparent. 
The left bronchial gland and the two large ganglions of the 
posterior mediastinum are hypertrophied, hard and knotty to 
the touch, their cortical layer is infiltrated with a large number 
of fine tub erculous granulations, some translucent, others 
opaque and caseic. 
