The plan of the bath at Riverside was not lost upon me in an undertaking on which I was then engaged--namely, building a bath for myself. My Apodyterium is at the back of my house; from this a Xystos, with a glazed roof, leads to the outer door of the Calidarium. Within the outer door is a vestibule, which upon occasion may serve as a Tepidarium. At the end of the vestibule is a second door, and this opened, we are in the Calidarium, an apartment more than ten feet high, fifteen feet long, and twelve wide. Along the side of the room runs a flue, with an area of four feet by nine inches; the flue crosses the end, and returns for a distance of two feet on the opposite side. At the point of return is the chimney. Two windows with thick glass let light into the room; and five circular openings, four inches in diameter, and closed by a telescopic lid (Looker's ventilator), supply an abundance of air; while a similar ventilator in the chimney-shaft secures its free circulation. The floor is a tesselated pavement of coloured octagonal tiles; and on the side corresponding with the door is a sunken Lavaterina, three feet six in length, two in breadth, and eighteen inches deep. Over the centre of the Lavaterina are two spouts, for cold and hot water; the latter being obtained from a galvanized iron tank, capable of holding twenty-five gallons, that stands on the returned flue, against the chimney-shaft. In this bath, as in Mr. Urquhart's, I expect to get various degrees of temperature, increasing in altitude from a temperate standard in the vestibule, to the highest temperature that can be required, immediately over the furnace, where I have established my Laconicum. CHAPTER II.[14] [14] This chapter is an abstract of a Paper read at the meeting of the National Association for the Promotion of Social Science, in Glasgow, in Sept. 1860. REVIVAL AND SANITARY PURPOSES OF THE EASTERN BATH.