_Remarks._--In the treatment of this disease, it is necessary for the farmer to know, that through the instrumentality of the nervous structure, there is constantly a sympathy kept up between the different parts of the animal; whenever any part is affected, the corresponding part feels the influence. Thus the external surface is opposed to the internal, so that, if the function of the former be diminished, or excessive, or suspended, that of the latter will soon become deranged; and the restoration of the lost function is the only true way to effect a cure. For example, if an animal be suffered to feed in wet lands, the feet and external surface become cold; and hence diarrhoea, catarrh, garget, dysentery, &c. If the circulation of the blood is obstructed by exposure, we should restore the lost function by rubbing the surface, and by the application of warmth and moisture. If the animal is in poor condition, and there is not enough vitality to equalize the circulation, give warm anti-spasmodics. (See APPENDIX.) In cases where diarrhoea results from a want of power in the digestive organs to assimilate the food, the latter acts on the mucous surfaces as a mechanical irritant, producing inflammation, &c. Inflammation is the concentration of the available vital force too much upon a small region of the body, and it is invited there by irritation. Now, instead of the popular error,--bleeding and purging,--the most rational way to proceed is, to remove the cause of irritation, (no matter whether the stomach or bowels are involved,) and invite the blood to the surface by means already alluded to, and distribute it over the general system, so that it will not be in excess any where. There is generally but little difficulty in producing an equilibrium of action; the great point is to sustain it. When the blood accumulates in a part, as in inflammation of the bowels, the sensibility of the part is so highly exalted that the least irritation causes a relapse; therefore the general treatment must not be abandoned too early. DYSENTERY. The disease is generally ushered in with some degree of fever; as, trembling, hot and cold stages, dryness of the mouth, loss of appetite, general prostration, drooping of the head and ears, heaving of the flanks; there are frequent stools, yet these seldom consist of natural excrement, but are of a viscid, mucous character; the animal is evidently in pain during these discharges, and sometimes the fundament appears excoriated.