APPLIANCES NEEDED IN TESTING WATER.
The chemical apparatus needed for the examination of well-water are, a balance that will weigh accurately to half a grain; an oil stove for evaporative purposes; a few pint porcelain evaporating dishes; a sand-bath, which can be made from a piece of sheet-copper; a dozen test tubes; half a dozen vials to hold solutions of chemically pure chemicals; some pieces of glass tubing; a small mortar and pestle; a supply of filtering-paper; and the vessels needed for measuring accurately. For the solution of the chemical re-agents to be used, a supply of distilled water is necessary; and water of this kind is also necessary to make comparisons with. A piece of pure crystalline ice, when melted, will generally produce water pure enough for experimental purposes.