I am Mike Smith, a long-term pre-cinema collector and researcher with an interest in all optical instruments that demonstrate the principles of 'persistence of vision'. I am trying to locate examples of this machine [praxinoscope plus musical box] for a research project I am undertaking. I wonder if any of your readers have come across such a machine and would be willing to share information with me. Mike Smith Kirkby Malzeard, North Yorkshire, U.K. http://www.magiclantern.org.uk/ kime1944@gmail.com.geentroep [delete ".geentroep" to reply] [ praxinoscope atop musical box [ http://www.mmdigest.com/Attachments/18/02/16/180216_075002_238_1.jpg [ Ref. http://www.mhs.ox.ac.uk/exhibits/fancy-names-and-fun-toys/praxinoscope/ [ -- Robbie