. A treatise on hygiene and public health . water besecured for cases where its use would be beneficial. SECTION IX. DRAINAGK No drain should pass under any part of a hospital, or, indeed, underany inhabited building, but should be conducted directly away from thewalls into a common sewer. Drains should be trapped atthe various points wherewater enters them—as, forexample, at basins, bath-tubs,sinks, and water-closets aswell as at some point outsideof the building, before thelarge service-drains enter thecommon sewer. No bettertrap for basins, sinks, andurinals can be suggested thanthat of Col
. A treatise on hygiene and public health . water besecured for cases where its use would be beneficial. SECTION IX. DRAINAGK No drain should pass under any part of a hospital, or, indeed, underany inhabited building, but should be conducted directly away from thewalls into a common sewer. Drains should be trapped atthe various points wherewater enters them—as, forexample, at basins, bath-tubs,sinks, and water-closets aswell as at some point outsideof the building, before thelarge service-drains enter thecommon sewer. No bettertrap for basins, sinks, andurinals can be suggested thanthat of Col. Waring, a cut ofwhich is given (Fig. 51). Anundoubted source of dangerin the ordinary trap lies inthe fact that the water-sealbeing exposed to sewer-gaswider 2^^cssure from below,absorbs sewer-gas, which itgives off at the natural den-sity of the atmosphere has been foundto produce its chemical effectat the house end of a trapwithin fifteen minutes afterbeing introduced at the sewer , but also a metal Fig. 51.—Warings Warings trap has not only thewhich is claimed to be water-, steam- 782 GENERAL PRINCIPLES OF HOSPITAL CONSTRUCTION. and gas-tight, and which allows the passage of water downward, but is aperfect protection against any return current coming from the oppositedirection. English architects—and it may well be conceded that the English arefar in advance of us in sanitary architecture—recommend that drain-pipesdischarge their contents outside the building, through an open pipe ona grating, and then through a flush trap into the sewer; but, if properlytrapped and ventilated, a continuous drain seems preferable, and in coldclimates the pouring out of the sewage on the open grate would be im-practicable. The smaller drain-pipes within the building may be of lead-pipe, ofa size commensurate with the work to be accomplished; soil-pipes shouldalways be of iron. The main drain-pipes, and especially the soil-pipes,must in a
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthygiene, bookyear1879
