When the stable is properly constructed, and not too large for the number of horses, it need never be heated by fire or steam. These conditions being observed, I know of no case in which it is necessary to produce an artificial supply of heat for healthy horses. The heat which is constantly passing from the horse's body soon warms the air, and judicious ventilation will keep it sufficient ly comfortable; but in no case should a high heat be purchased by sacrificing ventilation so far as to produce sensible contamination of the air. It is better either to employ heavier clothing, or to heat the stable by fire.

Slow-work horses, and all those that are much exposed to the weather, and especially those that have to stand out of doors, must not have hot stables, yet they should be comfortable.

The temperature of stables is generally regulated by opening or shutting the windows. On very hot days, it may be proper to sprinkle clean water on the floor, or about the ground outside the doors.

Sudden Transitions should be carefully avoided, most especially when the temperature of the stable is habitually very low or very high. Whether the transition from heat to cold, or that from cold to heat, be most pernicious, is still a subject of debate. But it is admitted by all that both are injurious My own experience leads me to believe that cold does much more harm to a horse that has just been severely heated, than heat ever does to a cold horse. Either transition, however, should be effected by slow degrees. To a certain extent the horse may be inured to an alteration either way, without suffering any injury, if time be allowed for the system to adapt itself to the change.

When the horse himself is very hot, he may be refreshed by standing about three minutes in a cool stable, but he must not stand there till he begin to shiver. Neither must a hot horse be put into a hot stable, especially if he have been much exhausted by his work. It makes him sick, and keeps up the perspiration, and some faint outright. A very cold horse should not be put into a very hot stable. If he be wet there is little danger, but if dry he becomes restless and somewhat feverish, and in this state he remains ill he begins to per spire.