[Illustration: THE APPARATUS BY MEANS OF WHICH A TOBACCO SMOKE ENEMA IS ADMINISTERED. _a._ The sole opening by which air can enter. It is placed upon the ground and guarded by a valve; so that air, after having entered, cannot leave the instrument by this opening. _b._ The box containing lighted tobacco, through which all air drawn into the instrument must necessarily pass. _c._ The pump. _d._ The end of the tube through which the fumes are driven. To load the instrument: unscrew the lid of the box. Fill that with lighted tobacco. Fix on the lid again. Rest the air entrance upon the ground, and move the handle of the pump up and down. By this movement the air is first drawn through the lighted tobacco into the pump, and is then sent through the tube. ] [Illustration: A HORSE THAT HAS RUBBED ITSELF VIOLENTLY AGAINST A WALL.] These parasites inhabit the large intestines. They produce extraordinary ravages, notwithstanding their insignificant appearance. The last is difficult to eradicate because of the extent of bowel which it infests. The =stronguli= will sometimes eat through important structures, but the =ascarides= are always located within the rectum. Then, most medicines being deprived of activity, are inoperative before they reach the last locality. For this reason it is best to commence the treatment with injections of _train_ oil. Should these be followed by no result at the expiration of a week, resort to a solution of catechu--one ounce to the quart of water: give that for seven mornings. Upon the eighth, give the animal a mash, and at night administer a mild physic ball; about four drachms of aloes and one drachm of calomel. Repeat the medicine if required; but if not, resort at once to the arsenicalis and ale or stout, which was recently recommended. Tobacco smoke enemas are sometimes efficacious when all the previous measures are powerless. Frequently the posterior irritation is distressing. It is sometimes so provoking that the horse will thereby be induced to destroy its personal appearance by rubbing the tail and quarter violently against the wall, or any rough surface within its reach. In such cases the injections of train oil are most likely to prove beneficial; the local itching may be in some measure removed by inserting up the anus a portion of the following ointment night and morning:-- Glycerin Half an ounce. Spermaceti One ounce. Melt the last and blend. When nearly cold, add-- Mercurial ointment (strong) Three drachms. Powdered camphor Three drachms. SPASMODIC COLIC.--FRET.--GRIPES.