3's

Updated: August 8, 2026

To explain the state of the frame as it appears in the cut, we must first suppose that the twenty-four balls which appear in four lots, are gathered together at the figured side: when the children will see there are three perpendicular 8's, and as easily that there are 8 horizontal 3's.

Samuel Wilderspin - The Infant System: For Developing the Intellectual and Moral Powers of all Children, from One to Seven years of Age