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air inlet allowed aperture Ball valve basement basin bricks carbonic acid carried ceiling chimney cistern compartment connected container contrivances course covered cowl cylinder D-trap discharge disconnected domestic purposes drains draught drinking water dust dust-bins escape excretal matters exit shaft filtering material fixed floor flue foul air foul water frequently galvanised iron ground hard waters holes hopper closet house sewer impervious impure inside instances iron grating Jefferson Medical College joints kind louvres main sewer means metal milk of lime necessary nuisance organic matter outer air overflow pipe Parkes Museum pass perforated pervious placed quantity of water quently rain-water receptacles refuse matters sanitary sewer or cesspool side silicated carbon sinks soft water soil soil-pipe sometimes stoneware stoves stratum supply of water surface syphon trap tank thrown tube typhoid fever valve box valve closet ventilating pipe vertical wall warm waste pipe water-closets window zinc
Page 47 - It ought to be an absolute condition for a public water supply that it should be uncontaminated by drainage.