This evidence appears to contradict the assumption that tap water should only be considered in heavily colonized environments.
In the case of the fountain the experiment may be made by leading tap-water through a Woulfe's bottle in which a little milk has been placed.
Thus, a shallow tin vessel, such as the lid of a biscuit box, may be levelled and filled with tap-water through a rubber hose.
Remember to water azaleas with rainwater collected in a rain butt, not with tap water.
Water Tap water is normally chlorinated, and whilst relatively safe, may cause stomach upsets.
