VISCIDITY of the BLOOD
—is that state in which the blood is frequently known, when, by a collapsion of the pores, (from some of those causes which produce colds, coughs, and inflammatory diseases,) it acquires a preternatural consistence from the external repulsion of the perspirative matter, which, thrown upon the circulation, constitutes a siziness of the blood: this, by its retention, becomes so viscid and adhesive, (or tough,) that, when it has been drawn off by bleeding, and set by two or three hours to cool, it is with difficulty separated upon the surface, even with the sharpest penknife. Horses having their blood in a state too sizy and viscid for the perfect purposes of secretion and health, soon display it in some way or other: a heaviness of the head, a dulness of the eyes, a lassitude of the body, a husky tendency to cough, a rough harshness in the coat, a swelling of the legs, or cracks in the heels, (particularly if it happens in the winter season,) are some of the indications by which it may be readily known, and should be speedily counteracted. Unloading the vessels, by twice bleeding, about ten days apart, attenuating the crassamentum of the blood by mild diuretics, and altering its property by a short course of alterative powders, will prove all that is necessary to promote and ensure condition.