Ripple Tank and Projector
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Probably used at the Ballarat School of Mines as a teaching aid to demonstrate surface wave propagation in liquids.
A hollow cast iron base contains electrical components which provide upward illumination of variable frequency. Cover is shaped lile a soup plate, with a 6.5cm diameter lens in the centre. An overhead lens transmits light to an adjustable mirror for viewing from the side. Complet with 240 volt AC lead and plug.
