Developed by Edison's assistant, W.K.L. Dickson, the kinetoscope was a precursor to the modern motion-picture projector. It works through a phenomenon known as "persistence of vision," in which a sequence of images creates the illusion of motion. Initially, Edison hoped to synchronize the images with sound, but he was unable to achieve this. The kinetoscope was designed to be viewed by one person at a time. Why did Edison supposedly balk at the idea of projecting films before larger audiences? Discuss (http://forum.thefreedictionary.com/postst28402_Thurgood-Marshall-Confirmed-as-First-African-American-US-Supreme-Court-Justice--1967-.aspx)
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