The leading symptom, or that which is looked for as indicative of broken wind, is found in the breathing. Respiration is accomplished by a triple effort: inhalation is quick and single, expiration is slow and double. The air is drawn upon the lungs as by a gasp. This being quickly accomplished, the ribs commence to expel the vapor, and move laboriously to their utmost extent without being able to effect the purpose. The movement of the chest and the inhalation are counted as two efforts. Then ensues the third. The abdomen begins to rise, with an evident desire to aid in emptying the lungs by driving forward the diaphragm, and thereby diminishing the capacity of the thorax. These two last efforts are comparatively laborious; but the double effort is only partially completed before a sense of suffocation forces the animal to gasp once more for breath. There certainly are several circumstances which favor the opinion that broken wind is a disease of the digestive organs. In the first place, the great majority of broken-winded horses are to be found in those stables where the animals are badly fed; moreover, it is no unusual thing for a gentleman to turn his nag out to grass, or into the straw-yard, and to take it up broken winded. Then, again, low dealers, who frequent fairs and public houses, have a method of what they term "setting broken wind;" this consists in pouring into the stomach various substances which cause the indicative symptom of the disease to be for a time concealed. Grease, tar, shot, and many filths are used for this purpose--anything which seems to induce nausea appears capable of producing such an effect. These things may conceal, but they cannot destroy, the characteristic cough; a copious draught of cold water, by refreshing the stomach, will induce the restoration of all those signs natural to the disorder. Formerly there was very generally accepted a supposed cure for broken wind. The flatus is one of the most marked and troublesome symptoms of the disease; that, when coaches had possession of the roads, rendered a broken-winded animal unsuited to run in such vehicles. To master the objection, and also, by relieving the intestines, to enable the broken-winded horse to live through the pace, a hole was bored into the rectum from without by means of a heated iron; into this hole a leaden tube was inserted, and by that the flatus found egress without the outside passenger being unpleasantly aware of its perpetual escape.