Chapter 4 AnimATion 145 The magic lantern would project these images in quick succes- sion so the human eye was fooled into interpreting it as a single moving image. In Victorian times, animation-type games like the flip book and the zoetrope were popular. The flip book allowed the player to draw sequential images on the pages of a small book. The pages were then flicked through quickly to trick the eye into see- ing the images move. The zoetrope was a more sophisticated version of the flip book. It was a cylindrical drum with regularly spaced slits that one could look through, revealing a moving image (Figure 4.2). This "movie" was, of course, just a sequence of images cycled quickly one after the other. When the drum was spun, it would create the same persistence of vision effect.