A HORSE or MARE in high health, seldom varies much in the colors or quantities of what are termed the excrementitious discharges from the body; as they are in general a tolerable criterion of the real state it is in. The dung from a horse in good condition for work, free from a viscid or diseased affection of the blood, and the various disorders and humours dependent thereupon, will be mostly observed of a pale yellow, moderately united in firm bright globules, rather brittle than adhesive, with a shining slippery surface, but perfectly free from a glutinous viscid slime. If the dung is _hard_, _black_, and _offensive_, when it falls, the body is overloaded, the habit is costive, and it has been too long retained; if covered with the gluey slime before described, it is a sufficient proof of internal foulness, and most probably of impending disease. When a horse is labouring under a dangerous disease, some occasional assisting information may be derived from the URINE as it _falls_, and much more if caught, and set by to subside. If it comes away limpid and colourless, remaining in that state after being set by, it is not considered a symptom of a very favourable complexion; but if it comes away red, or of a turbid yellow, with an oily skin upon its surface, and afterwards deposits a kind of brickdust sediment, with a kind of strong or terebinthinate effluvia, it may be considered a good sign, and is very frequently the harbinger of a _speedy_ recovery. If, during the progress and various changes of disease, it should assume different appearances, first of the healthy, and then the opposite aspect, the case is doubtful, and danger may be apprehended; as it affords sufficient demonstration, there is a powerful struggle in the system, and the morbid miasma is not subdued. The best state of a horse's urine, when in HEALTH and CONDITION, is of a yellowish tinge, moderate consistence, a strong smell, rather grateful than offensive, and a penetrating property: these, in the aggregate, may be concluded indications of _spirits_, _strength_, and _vigour_; the reverse, (in any serious degree,) slight symptoms of disquietude, or impending disease. After all the inculcations that can possibly be introduced under this head, the most judicious and experienced practitioner will sometimes find it extremely difficult to distinguish, with certainty, between one internal disease and another; having nothing to assist him in the discovery but his own judgment, and the most predominant symptoms at the _moment_, many of which are common to other diseases. Notwithstanding these uncertainties, and the doubts which may arise between one and the other, it is the duty of every Veterinarian to acquire as perfect a knowledge as possible of DIAGNOSTICS; for although his incessant inquiries may not render him an _infallible_ guide in every case without exception, it will afford him the gratification of a distinguished