341. Encrusted Tea-Kettles
Water of every kind, except rain water, will speedily cover the inside of a tea-kettle with an unpleasant crust; this may easily be guarded against by placing a clean oyster-shell or a piece of stone or marble in the tea-kettle. The shell or stone will always keep the interior of the kettle in good order, by attracting the particles of earth or of stone.
342. To Soften Hard Water
To soften hard water. or purify river water, simply boil it, and then leave it exposed to the atmosphere.
343. Cabbage Water
Cabbage water should be thrown away immediately it is done with, and the vessel rinsed with clean water, or it will cause unpleasant smells.
344. Disinfectants