The lack of the extreme hyperæsthesia and excitability of rabies, and usually of the mischievous disposition to bite, the presence of foreign bodies in the mouth or gullet, and the evidence of disorder of digestion, with costiveness, tympany, and tenderness, and the history of the case may serve to differentiate. In cases of doubt the inoculation of a rabbit on the brain should demonstrate the absence of rabies by the absence of the characteristic symptoms after sixteen days. _Treatment._ As delirium in animals is a deranged innervation from congestion, narcotic drugs, ptomaines, etc., it must be looked on as in most cases a mere phenomenon, pointing to a definite disease, or to a particular intoxication, and treatment must be directed toward the removal of the primary cause. Thus the remedial measures must be directed in the different cases to the encephalitis, meningitis, digestive disorders, contagious disease, or drug to which the affection may be traced. The patient must be put in a strong enclosure or securely tied so that he can do no harm: it will often be desirable to secure shade or cool air, or to apply cold water or ice to the head, and to quiet the nervous excitement by inhalations of chloroform, or ether, rectal injections of chloral, or bromides, or full doses of hyoscine, sulphonal, trional or tetronal. These may be pushed to the extent of inducing anæsthesia, sleep or quiet, as the case may be, and meanwhile other measures should be taken to eliminate the poisons, correct the congestion, or remove the source of irritation. Anæmic cases may demand iron and bitters, with an aliment rich and easily assimilated, while plethoric cases may require purgation, diuresis or even bloodletting. All noise and any cause of excitement must be carefully guarded against. VICIOUSNESS. AGGRESSIVE VICE. Subject maliciously using its natural weapons. Horse kicks, bites, crowds against wall, rears, bucks, plunges, treads upon. Cattle use horns or forehead, or kick. Dog bites. Cats scratch and bite. Ticklishness different. Developed or inherited. Revenge. Desperation in pain. Sexual. A psychosis. Responsibility of owner, in selling, toward employe, in exposing in a public place. Treatment: remove source of suffering, treat kindly, secure confidence, castrate, place under absolute constraint, throw _a la Rarey_, Comanche bridle, tie head to tail and circle, etc. This word is employed to cover only those forms of vice in which the animal shows a malignant disposition to attack or injure man or beast. Each animal uses its natural weapons according to the occasion. The =horse= strikes with his fore feet, kicks with his hind, bites, crowds his rider’s leg against a wall, or his attendant’s body against the side of the stall, rears, bucks, plunges, or treads his victim under his feet.