In this system the arrangement of the cellar piping is the same as in the "wet" return previously described, but the supply to the radiators consists of but one pipe, taken off from the main supply in the cellar, the steam flowing in, and the condensation draining out, through this single pipe to the main and thence through frequent "drip pipes", to the return pipe, near the cellar floor. (Fig. 59.) If the return pipe in the cellar is run overhead, as in the "dry" return system the drip pipes should be connected to the return main by a loop falling below the return, thus forming a trap and preventing the steam from flowing directly into the return.

Fig. 59. One Pipe Relief System.

Fig. 59. One-Pipe Relief System.

LAYOUT OF GROUNDS AROUND RESIDENCE OF MR. J. S. HANNAH, AT LAKE FOREST, ILL.

LAYOUT OF GROUNDS AROUND RESIDENCE OF MR. J. S. HANNAH, AT LAKE FOREST, ILL.

Shepley, Rutan & Coolidge, Architects, Chicago, Ill. For Exterior, See Opposite Page; for Plans, See Page 90

RESIDENCE FOR MR. J. S. HANNAH, LAKE FOREST, ILL.

RESIDENCE FOR MR. J. S. HANNAH, LAKE FOREST, ILL.

Shepley, Rutan & Coolidge, Architects, Chicago, Ill.

Built in 1895. Cost $17,000, Including Stable Shown on Page 74, Vol. II. The Staircase is Made a Feature on the Exterior. Shingles of Walls Stained a Dark Brown; Roof Shingles Stained Green. For Layout of Grounds, See Opposite Page; for Plans, See Page 90.