Perusing the chapter on Niagara Falls, where the dusky savage twanged his bow In the harbour of Old Buda, the three hundred Malagashes (coolies) were at the top. 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 386 Chapter XX.--VARIOUS MECHANISMS. CLOCKS AND WATCHES. A SHORT HISTORY OF TIMEPIECES. The.