Catarrh, or common cold, is simply a congested or inflamed condition of the mucous membrane lining the nasal chambers and other cavities of the head.

Causes. - Cold, damp stable; standing in a draft of air: driving against a cold wind; standing without blanketing after rapid driving.

Symptoms. - Dullness; discharge from the nostrils, probably thin at first, but growing thicker; sometimes constipation, and scant, high-colored urine.

Treatment. - Place the patient in a well ventilated stable, and blanket if the weather is cold. Feed moderately on bran or oats and hay, and keep a pail of clean water where he can drink at will. Give from one to two drachms of nitrate of potash three times a day, either in the feed, water, or on the tongue.