lamp-holes

Updated: May 24, 2025

But with drains laid in straight lines, from point to point, with man holes or lamp holes at the intersections, there is no reason why the whole system may not easily be examined at any time and stoppages quickly removed. The man holes and lamp-holes may, with advantage, be used as means for ventilating the drains and also for flushing them.

Various - Scientific American Supplement, No. 384, May 12, 1883