154 PRINCIPLES AND PRACTICE OF MILK HYGIENE 
The subparotid lymph-gland is about 21% inches long, flat 
and tongue-like in form and is located just under the anterior 
border of the parotid salivary gland and about 3 inches below 
the base of the ear. In feeling for this gland press the finger 
inward and backward in the groove between the posterior border 
of the lower jaw and the parotid salivary gland. 
The retropharyngeal lymph-gland, also called the pharyn- 
geal and superior pharyngeal, is about 2 inches long and is 
situated on the posterior wall of the pharynx. It can be pal- 
pated, when enlarged, by pressing the extended fingers inward 
from each side toward the median line and as far forward as 
possible between the muscles of the neck and the larynx. 
The atlantal or posterior retropharyngeal lymph-gland is 
situated under the wing of the atlas, partly covered by the 
upper end of the submaxillary salivary gland. By pressing the 
fingers inward and upward under the wing of the atlas this 
gland is forced against the under surface of the wing of the 
atlas. 
When any of these glands in cattle are enlarged and firm 
and not hot or painful, tuberculosis is usually present. En- 
largement of the retropharyngeal glands may interfere with 
swallowing and respiration. 
Actinomycotic tumors may be observed in the submaxillary 
and peripharyngeal regions as well as in the maxille and tongue. 
9. Cough—Test each cow for cough by exerting 
pressure with the fingers on the larynx or first three 
rings of the trachea, or close both nostrils for about a 
minute; also grasp the skin over the withers with the 
fingers of both hands and draw it upward. Take note 
of any coughing which occurs spontaneously and identify 
the cow each time. 
A frequent, chronic cough is one of the most prominent 
symptoms of pulmonary tuberculosis. If a cow can be made 
to cough by pinching the larynx or the adjoining rings of the 
trachea, or by closing the nostrils, it is an indication of disease 
of the respiratory tract. Cough can usually be induced in this 
