The excellence of the Merinos consist in the unexampled fineness and felting property of their wool, and in the weight of it yielded by each individual sheep; the closeness of that wool, and the luxuriance of the yolk, which enable them to support extremes of cold and wet quite as well as any other breed; the readiness with which they adapt themselves to every change of climate, retaining, with common care, all their fineness of wool, and thriving under a burning tropical sun, and in the frozen regions of the north; an appetite which renders them apparently satisfied with the coarsest food; a quietness and patience into whatever pasture they are turned; and a gentleness and tractableness not excelled in any other breed. Their defects--partly attributable to the breed, but more to the improper mode of treatment to which they are occasionally subjected--are, their unthrifty and unprofitable form; a tendency to abortion, or barrenness; a difficulty of yeaning, or giving birth to their young; a paucity of milk; and a too frequent neglect of their lambs. They are likewise said, notwithstanding the fineness of their wool, and the beautiful red color of the skin when the fleece is parted, to be more subject to cutaneous affections than most other breeds. Man, however, is far more responsible for this than Nature. Every thing was sacrificed in Spain to fineness and quantity of wool. These were supposed to be connected with equality of temperature, or, at least, with freedom from exposure to cold; and, therefore, twice in the year, a journey of four hundred miles was undertaken, at the rate of eighty or a hundred miles per week--the spring journey commencing when the lambs were scarcely four months old. It is difficult to say in what way the wool of the migratory sheep was, or could be, benefited by these periodical journeys. Although among them is found the finest and most valuable wool in Spain, yet the stationary sheep, in certain provinces--Segovia, Leon, and Estremadura--are more valuable than the migratory flocks of others. Moreover, the fleece of some of the German Merinos--which do not travel at all, and are housed all the winter--greatly exceeds that obtained from the best migratory breed--the Leonese--in fineness and felting property; and the wool of the migratory sheep has been, comparatively speaking, driven out of the market by that from sheep which never travel. With respect to the carcass, these harassing journeys, occupying one-quarter of the year, tend to destroy all possibility of fattening, or any tendency toward it, and the form and the constitution of the flock are deteriorated, and the lives of many sacrificed.