the surface-water drains into one com-mon tank, for flushing or gardening purposes, andif so, a bad smell would struggle up to the groundsurface and disperse over the gratings. A cm^e in sucha contingency would be afforded by placing a box ofcharcoal over the grated aperture in the shelf insidethe… … A third form of the everlasting bell-trap, made withan overhead movable grating, and one which is used in 54 Sanitary Arrangements for Dwellings. stables, is exhibited at fig. 74. A ten-inch cast-irontrap, like that drawn at fig. 59, with a wrought-ironperforated cover, would, however, be much…
