These movable sheds may be connected with hay-barns--"hay-barracks"--or they may surround an inclosed space with a stack in the middle. In the latter case, the yard should be square, on account of the divergence in the lower ends of the boards or poles, which a round form would render necessary. Sheds of this description are frequently made between two stacks. The end of the horizontal supporting-pole is placed on the stack-pens when the stacks are built, and the middle is propped by crotched posts. The supporting-pole may rest, in the same way, on the upper girts of two hay-barracks; or two such sheds, at angles with each other, might form wings to this structure. On all large sheep-farms, convenience requires that there be one barn of considerable size, to contain the shearing-floor, and the necessary conveniences about it for yarding the sheep, etc. This should also, for the sake of economy, be a hay-barn, where hay is used. It may be constructed in the corner of four fields, so that four hundred sheep can be fed from it, without racking flocks of improper size. At this barn it would be expedient to make the best shelters, and to bring together all the breeding-ewes on the farm, if their number does not exceed four hundred. The shepherd would thus be saved much travel at all times, and particularly at the lambing-time, and each flock would be under his almost constant supervision. The size of this barn is a question to be determined entirely by the climate. For large flocks of sheep, the storage of some hay or other fodder for winter is an indispensable precautionary measure, at least in any part of the United States; and, other things being equal, the farther north, or the more elevated the land, the greater would be the amount necessary to be stored. HAY-HOLDER. Where hay or other fodder is thrown out of the upper door of a barn into the sheep-yard--as it always must necessarily be in any mere hay-barn--or where it is thrown from a barrack or stack, the sheep immediately rush on it, trampling it and soiling it, and the succeeding forkfuls fall on their backs, filling their wool with dust, seed, and chaff. This is obviated by hay-holders--yards ten feet square--either portable, by being made of posts and boards, or simply a pen of rails, placed under the doors of the barns, and by the sides of each stack or barrack. The hay is pitched into this holder in fair weather, enough for a day's foddering at a time, and is taken from it by the fork and placed in the racks.