If at work the horse stops suddenly, or if in the stable he ceases eating, seems frightened, stands for an instant immovable, braces his feet, sways, trembles, and falls heavily to the ground. Or he may remain for an instant supported on his rigid limbs, the jaws moving or firmly closed, the eyes rolling, and the facial muscles drawn or twitching. When down there are convulsive movements of the limbs, so that the animal may kick out violently, and tense contractions or twitchings may occur in the muscles of the croup, chest and abdomen. There is usually an increase of the salivary secretion with frothy accumulation about the angles of the mouth. The respiration is stertorous, dyspnœic, and interrupted, the nostrils widely dilated, the nasal mucosa of a dark brownish red, and the superficial veins distended. The pulse is weak, slow, irregular, intermittent and sometimes imperceptible. Sensation seems to be in abeyance. No attention is paid to loud sounds, nor to pinching, pricking, or even cauterizing the skin. Perspirations may break out on the flank or over the whole surface of the body. The duration of the attack may be from one to four minutes, or exceptionally ten or fifteen, after which the muscles relax, the twitching ceases, the horse raises his head, extends his fore limbs and finally rises. After rising some are dull and stupid for an hour or so, and may continue to perspire, some move the limbs, jaws or head automatically, turn in a circle, or seek seclusion and darkness, while some take at once to eating and seem as if nothing had happened. In _partial_ or _localized_ epilepsy the spasms are confined to a limited group of muscles like those of the jaws, neck, or fore limbs. These may alternately contract and relax, or they may remain rigid for a minute or less, the mouth being held open or firmly closed with grinding of the teeth, the eyes rolled backward and upward, or affected with strabismus, the face drawn and distorted, the head turned to one side or downward, or the limbs fixed and immovable. At the conclusion of an attack it is not uncommon to see a discharge of urine or fæces, or in stallions, of semen. The horse often contracts a fear of the place where the attack occurred, and this contributes, with the re-appearance of the former object of dread (car, locomotive, rifles, cannon, etc.) to precipitate a new attack if he is compelled to go to such a place.