Now, in a case of this description, never depend upon any report you may have received. Recollect choking may spring from two opposite causes. The symptoms may result from disease, as strangles; or they may arise from any tumor pressing against the respiratory channel. In that instance, however, remove the cause, and the effect will cease. Of genuine choking, during health, there remain two sorts: the high and the low choke. Thus, if the substance has become fixed in the pharynx, or has only passed six inches down the œsophagus, the symptoms are urgent. The remedy must be at hand, else the life is quickly lost. In the =high choke= the head is raised; saliva bedews the lips; a discharge soils the nostrils; the eyes are inflamed and watery; the countenance is haggard; the breathing audible; the muscles of the neck are tetanic; the flanks heave; the body is in constant motion; the fore legs paw and stamp; the hind legs crouch and dance; perspiration breaks forth; every movement expresses agony: wherefore, if relief be not quickly afforded, the horse falls and dies of suffocation. [Illustration: THE HIGH CHOKE.] The veterinary surgeon should attend such a case, prepared to perform tracheotomy, which sometimes is absolutely necessary, before anything intended to remove the obstruction can be attempted. The operation, in this case, is designed to be no more than temporary; therefore, the use of Mr. Gowing's tracheotomy tube is here decidedly in its proper place. It can be inserted; a few moments after it can be removed, and leave behind no loss of substance to be supplied or to retard recovery. [Illustration: AN EXTEMPORIZED HOOK TO RELIEVE HIGH CHOKING.] The balling-iron, after tracheotomy is accomplished, should be fixed in the mouth and the hand then introduced. Sometimes the impacted substance can be felt, but cannot be grasped. In this last case, a rough hook is to be extemporized out of any wire which may be at hand. It should be of the shape indicated in the preceding engraving, and of sufficient length to reach behind the obstruction. The hook is to be gently worked into its situation, and, with a sudden jerk, the foreign body is to be removed from the œsophagus.