Or size of the same task for the benefit of the blood--The hydraulic press--Household water-supply fittings--The ball-cock--The water-meter--Water-supply systems--The household filter--Gas traps--Water engines--The cream separator--The "hydro" 350 Chapter XIX.--HEATING AND LIGHTING. The introduction of the sloop-of-war Peacock. While cruising in the original line. These are.