Editing Magic lantern (section)

===Experiments===
There have been many different experiments involving sorts of movement with the magic lantern. These include:
*[[galvanometer]] slide: a flattened coil with a magnetized needle moving from side to side when a battery is connected.
*projection of moving frog legs, with the nerves and muscles of severed frog legs connected to electric wires.
*hour-glass projection: the projection of a flattened hourglass showed the sand flowing upwards. Extreme magnification made the effect extra impressive, with the grains of sand forming a wave-like pattern.
*cohesion figure projection of liquids: different oils and fats create many kinds of moving patterns when manipulated between clear glass plates or a narrow glass box.
Several of these experiments were publicly demonstrated at the [[University of Westminster#1837 to 1881: Royal Polytechnic Institution|Royal Polytechnic Institution]].<ref name=Hepworth1888>{{cite book|url=https://archive.org/stream/bookoflanternbei00hepwrich#page/170/mode/2up|last=Hepworth|title=The book of the lantern|first=T.C.|year=1888|pages=171–203}}</ref>