I. Arithmetical RecreationsII. Arithmetical Recreations (continued)III. Geometrical RecreationsIV. Geometrical Recreation (continued)V. PolyhedraVI. Chess-Board RecreationsVII. Magic SquaresVIII. Map-Colouring ProblemsIX. Unicursal ProblemsX. Combinatorial DesignsXI. Miscellaneous ProblemsXII. Three Classical Geometrical ProblemsXIII. Calculating ProdigiesXIV. Cryptography and Cryptanalysis