| http://www.w3.org/ns/prov#value | - If circumstances make it impossible to boil water, sterilise it with chemicals. FILTERING: Allow water to stand in its container so that sediment settles at the bottom. Then siphon it into a filter made up of a nylon stocking or other porous material, stuffed with layers of sand (bottom) charcoal and moss at the top. STERILIZING: CLEAR WATER: Add 2 drops household bleach per litre (1
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