pipe at roof top, or wherever it may terminate, is fur-nished with a cover d, and in case any condensationmight take place in the ventilating pipe c, a receptaclefor such water is provided at e, where it may be with-drawn at intervals. It sometimes happens that it becomes desirable toventilate the… … and in such cases it is well to insert a syphon with anoutlet as at a between the house side c, and the s^wer Deodorizing Traps. 39 or cesspool side d of the drain_, fitting it up with anupright pipe to a few inches, or it may be feet aboveground, and terminating it with an earthenware capwith…
