A =weak cough= wanting in resonance and heard only at a short distance from the horse, is usually associated with chronic chest diseases and the last stages of acute thoracic inflammations. A =short=, =broken= or =abortive cough= is one which appears to be suddenly cut short and suppressed, from the pain it causes. It is seen in the early stages of inflammations of the serous membranes of the chest or abdomen, when the quick rubbing of the dry and inflamed surfaces of these membranes on each other produces exquisite pain. It characterizes especially the _debut_ of pleurisy, pleuro-pneumonia and peritonitis. This cough is infrequent for the same reason that it is short. A =dry=, =loud=, =rasping=, or =croupous cough= is peculiar to the early stages of laryngitis, tracheitis and bronchitis, when the membrane is swollen, tense and dry. It is equally met with in diphtheritic and croupous affections implicating the larynx. A =small=, =weak=, =dry=, =husky cough= without any _rasping_ is characteristic of broken wind (heaves) emphysema of the lungs, asthma, or chronic bronchitis. A =soft=, =humid= or =rattling cough= exists in the advanced stages of laryngitis, bronchitis and pneumonia when the activity of the inflammation has given way and a free exudation has taken place from the mucous membrane. It is usually accompanied by a discharge, in solipedes from the nose, and in other animals from nose and mouth. A =soft cough= with a peculiar gurgling in the larynx is sometimes met with in croup. A =paroxysmal cough= is one repeated five, ten, or twenty times in rapid succession. It is common in chronic bronchitis, early heaves, emphysema, verminous bronchitis and influenza. In such cases it is observed chiefly when the subject is brought out to the cold air, when he takes a drink of cold water, or when he has just had some active exertion, or some dusty or fibrous food. A =symptomatic cough= is one due to disease in some other organs than the respiratory, and which irritates the air passages through nervous sympathy (reflex action). It is commonly small, short and dry. Inflammation or other disease of the liver, indigestions and intestinal worms are occasional causes of symptomatic cough. In the case of worms it may be loud, clear and ringing. OTHER MORBID SOUNDS. Besides cough may be noticed the _wheezing_ breathing characteristic of _broken wind_, _chronic bronchitis_ and _asthma_, _roaring_, _whistling_, etc., as already described, and the sound between a _moan_ and _grunt_, produced in pneumonia especially in the ox. EXPECTORATION.