Dr. Haughton on the same subject remarks that:--"Two varieties of _Tig Allui_, or sweating-houses, exist in Ireland, one kind being capable of containing a good many persons, and the other only intended for a single occupant." The former is that just described: it is heated in the same way as an oven, by making a large fire of wood in the middle of the floor, and after the wood is burnt out, sweeping away the ashes. Besides the cure of rheumatism, the young girls who have tarnished their complexion in the process of burning kelp or sea-weed for the manufacture of soda, also resort to the Tig Allui for the purpose of clearing their skin. The usual time for remaining in the bath is under the half hour. The second kind of Tig Allui--namely, that for the reception of a single person only--is described by Dr. Tucker, of Sligo, as follows:-- "It is built of stone and mortar, and brought to a round top. It is sufficiently large for one person to sit on a chair inside, the door being merely large enough to admit a person on his hands and knees. When any of the old people of the neighbourhood, men or women, are seized with pains, they at once have recourse to the sweat-house, which is brought to the proper temperature by placing therein a large turf fire, after the manner of an oven, which is left until it is burned quite down, the door being a flat stone and air-tight, and the roof, or outside of the house, being covered with clay, to the depth of about a foot, to prevent the least escape of heat. When the remains of the fire are taken out, the floor is strewn with green rushes, and the person to be cured is escorted to the bath by a second person carrying a pair of blankets. The invalid, having crept in, plants himself or herself in a chair, and there remains until the perspiration rolls off in large drops. When sufficiently operated on, he or she, as the case may be, is anxious to get out, and the person in waiting swaddles him up in the blankets, and off home, and then to bed. I have heard old people say that they would not have been alive, twenty years ago, only for the sweating-house.... Remains of the Tig Allui are also found in the county Tyrone, of the following dimensions:--five feet in height, nine in length, and four in width, being built of solid masonry, and shaped like a bee-hive at the top."