For ligature procure a fine, hollow tube, having at one end a cover made to screw on and off; the opposite extremity must be open, and should have a cross bar attached externally, one inch from the termination. Upon the cover two holes must be bored, each large enough to admit a fine wire; to arm this instrument, which should be about eighteen inches long, procure a piece of zinc wire one yard and a half long; push this through one of the holes on the unscrewed cover and down the tube; screw on the cover; fasten the projecting end of the wire to the cross bar; return the wire through the other hole, and, passing it down the tube, leave it hanging free. Form of the wire a loop, large enough to surround the polypus; pass it gently over the head of the growth; by means of the tube, work the loop upward, tightening the wire as the size of the polypus diminishes. When the wire is round the pedicle, fix it by winding it also over the cross bar; then slowly make turns with the tube, observing the growth while so doing. When the tumor changes color or the animal exhibits pain, discontinue all further movements; release the wires from the cross bar and withdraw the tube, leaving the ends of the ligature protruding from the nostril and turned up on one side of the face. Order the horse to be fastened to the pillar-reins that night, and to be watched while feeding. The next day, if the tumor do not feel sensibly cold and has not evidently lost the living hue, reinsert the wires into the tube, fix them again on the cross bar, and give another turn or two. If small alteration be subsequently observed, the same evening the proceeding may be repeated; but, when death appears confirmed in the tumor, twist the tube till the pedicle gives way. The advantages possessed by this invention is, firstly, the ability of twisting a ligature tight when the growth is partly removed from view. Also, in the adoption of wire which will retain the form it is placed in, and remain unaffected by the moisture natural to the nostrils. Moreover, the tube can be made without the screwing head-piece, and answers quite as well, or even better, when solid. If made without the screwing head-piece, it can assume a flattened form, and it is somewhat easier to introduce; but the wire, in that case, must have both ends pushed through the holes down the tube. The =bleeding polypus= is not met with in the horse. For that polypus which sprouts from the nasal membrane and extends to the fauces, impeding respiration and deglutition, appearing like a disease of the structure, to which it is attached by a broad base, nothing can be done. It grows fast, and in a short time renders longer life a larger misery. [Illustration: A TENACULUM.]