Napier's bones Hello, the diagram for making your own bones has an error. The first bone should be 5-6-4-3, not 5-7-4-3. Opposite sides should add to 9, and there should be 4 columns of each number in the complete set. Reply
Hello, the diagram for making your own bones has an error. The first bone should be 5-6-4-3, not 5-7-4-3. Opposite sides should add to 9, and there should be 4 columns of each number in the complete set.