These are given in fevers, inflammation, constipation, etc., to empty the posterior part of the bowels. They are administered by a large syringe which can contain a quart or more of water, with a nozzle about twelve inches in length, with an ox's bladder tied to a pipe, or a large funnel with a long nozzle at a right angle; but the syringe is best. Water alone is usually employed for enemas; it should be about the temperature of the body, not less, but perhaps a degree or two more. To administer it one of the horse's fore-feet should be held up, while the operator (having filled the instrument, and smeared the end of the nozzle with a little lard or oil) pushes the latter very gently and steadily for a few inches into the intestine, and then presses out the water. The amount injected will depend upon the size of the animal; from two to three quarts would suffice for an ordinary-sized horse