The sloping of the floor of stalls from the manger to the heel-post is injurious and uncomfortable for the animal, who stands in an unnatural position, with the fore legs higher than the hind ones. When earthen floors are not level, they give more trouble, as the horse will paw a hollow for his fore feet unless he can elevate his hind legs by backing out of the stall. Whenever the horses go out of the stable, the windows of their stalls are to be kept open, unless necessary to exclude rain or snow, or when cold draughts affect the animals in contiguous or opposite stalls. Stable doors are never closed in the daytime except to keep out the wet or to exclude cold winds. If the doors be in a single piece, bars are put across the doorway; if divided in half, it will be usually sufficient to open the upper part. At night, except in very hot weather, they should be closed and locked, communication with the stable being kept up by a manhole. Except in very cold, windy weather, or in very hot weather, where there is no shade, horses should stand most of the day at the picket-line, as they have better air and are less confined, while the stables become drier and more healthful. In ordinary climates military stables must be kept as cool as possible. If the horses do not stand directly in the draught, the colder the stable the less will they suffer if suddenly called to take the field. For the same reason horses should never be blanketed in the stable except in very cold weather in high latitudes. STABLE DUTY. The captain is responsible for the proper performance of stable duty in his battery. At morning stable-call the cannoneers, assisted by the prisoners, clean out the stalls and police the stable under the direction of the stable sergeant. The bedding is taken up, that which is much soiled being separated for the manure-heap, and the remainder put on the racks or spread upon the ground to dry. If necessary, the drivers assist after they have done grooming. At evening stable-call the stable is policed as in the morning; the bedding is laid down and fresh straw spread on top of it; the bed must be soft and even, with the thickest part toward the manger. Horses are groomed twice daily, at morning and at evening stable-calls, under the supervision of the first sergeant and battery officer of the day. In special circumstances it may be advisable to groom only once, about noon. The grooming is always at the picket-line, except in stormy weather.