28 Old-time Schools and School-books
the case, this was supplemented at the bottom by the Roman numerals.
A curious successor to the hornbook was produced by a Hartford publisher in 1820. It was called " The Revolving Alphabet or Child's Instructive Toy," and consisted of two wooden disks about five inches in diameter with a circular sheet of paper between them. On one side of the paper was printed the alphabet; on the other side a series of little syllables. By turning a thumb-piece the paper inside the disks could be made to revolve, and an aperture near the edge of one of the disks allowed you to see the printing, a short column at a time. I imagine this educational toy never had much vogue, and that few people have ever seen one.