London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 348
p-stone (a)should not touch the cover (/;) within half an inch, in order that a current ofair may pass to allow the water and soil to flow through the trap and drain.This latter point is that to which I wish to call your attention, as the articlebefore referred to does not show this, or mention the… … \m
Architecture
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