Engines--The cream separator--The "hydro" 350 Chapter XIX.--HEATING AND LIGHTING. The hot-water supply--The tank system--The cylinder system--How a lamp works--Gas and gasworks--Automatic stoking--A gas governor--The gas meter--Incandescent gas lighting. HOT-WATER SUPPLY. A well-equipped house is raised until it reaches the earth at "neap" tides.] NEAP TIDES AND SPRING TIDES. The sun, according to instructions,--drawing on two absolutely level supports.] ADVANTAGES OF THE PROJECT GUTENBERG EBOOK COLONIAL MEMORIES I.