The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 311
probably to be preferred, and I have hitherto used the onerepresented at g, fig. 4. This is merely a modification of the former, andanswers well. It is made of earthenware. Wliere the fall of a sewer is notgreat, and the house drains are apt to be filled with back-water, the flapTalve is the most… … 1S48.] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 981 grates should have no water traps, but in their place should have flap valvesof the same kiuil as the house drains. Figs. 6 and 7 sliow the liind ofgully grate and valve used. The grate, it will be seen, is vertical, the faceof it being in the…
Architecture · Civil engineering · Science
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