Mr. Roberts, of Pennsylvania, says, "Early in my experience, I witnessed the renovation of a flock of what we call country sheep, that had been too long propagated in the same blood. This was about the year 1798. An imported ram from England, with heavy horns, very much resembling the most vigorous Spanish Merinos, was obtained. The progeny were improved in the quality of fleece, and in the vigor of constitution. On running this stock in the same blood for some twelve years, a great deterioration became apparent. A male was then obtained of the large coarse-wooled Spanish stock: improvement in the vigor of the progeny was again most obvious. A Tunis mountain ram was then obtained, with a result equally favorable. In this process, fineness of fleece or weight was less the object than the carcass. In 1810, a male of not quite pure Merino blood was placed with the same stock of ewes; and a change of the male from year to year, for some time, produced a superior Merino stock. Wool of a marketable quality for fine cloths was now the object; and it was not an unprofitable husbandry, when it would sell in the fleece, unwashed, from eighty-six cents to one dollar. The Saxon stock then became the rage, and the introduction of a tup of that country diminished greatly the weight of the fleece, without adequately improving its fineness. A male of the Spanish stock would give sometimes nine pounds; and the marsh graziers say that they went as high as fifteen pounds. Saxon males scarcely exceed five pounds, and the ewes two and a half pounds. By running in the same blood, and poor keeping, the fleece may be made finer, but it will be lightened in proportion, and of a weak and infirm texture. There are few stock-keepers who have mixed the Spanish with the Saxon breeds but what either do or will have cause to regret it. In this part of the country, a real Spanish Merino is not to be obtained. Sheep-raising has ceased to be a business of any profit nearer to the maritime coast than our extensive mountain ranges, whether for carcass or fleece. I sold, the last season, water-washed wool, of very fine quality, for thirty cents per pound. At such a price for wool, land near our seaports can be turned to better account, even in these dull times, than wool-growing. Stock sheep do best in stony and elevated locations, where they have to use diligence to pick the scanty blade. Sheep on the sea-board region should be kept more for carcass than fleece; and feeding, more than breeding, ought to be the object for some one hundred miles from tide water. It is now a well-ascertained fact, that health and vigor can only be perpetuated by not running too long on the same blood. The evils I have witnessed were due to a want of care on this head more than to any endemical quality in our climate. Sheep kept on smooth land and soft pasture are liable to the foot rot. The hoofs of the Merino require paring occasionally, for want of a stony mountain side to ascend.