Lissajous Forks
 These large tuning forks, made from iron and mounted on a wooden base, were used to generate Liassajous patterns and standing waves.  The forks would be set up facing each other with a wire connected to the top of  each of the forks. When the forks are excited, a standing wave is set up on the wire. Made by the Charles S. Bourne of Lowell Mass. 



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