place of the pinhole, would sharpen the image.
          A group of people in a darkened room, watching 
     images on a wall—thrown by a beam of light cutting 
     through the darkness—must have resembled a group 
     watching home movies. There was one difference: the 
     picture was upside down.
          Presently the lens was being put in one side of a box 
     instead of in the wall of a room. Through mirrors the 
     image could be thrown on a glass screen in the box, and 
     seen right side up.
          The box, still thought of as a small room, was called 
     a “dark room” or “camera obscura”. This camera could be 
     aimed at a landscape, street, garden party. A group of 
     people looking in amazement at the moving images in the 
     box may well have resembled a group watching television.
          Magicians began using the device for mystification