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 watched. Bokányi has come in very orthodox company. 'All that is why I should consider myself your father, my child; you mourn your own.